[1] A.S. Pramasdyahsari, R.D. Setyawati, and I.U. Albab, “How group theory and school mathematics are connected: an identification of mathematics in-service teachers.,” Journal of Physics: Conference Series. vol. 1663, no. 1, pp. 1–10, 2020.

[2] I Isnarto. Kemampuan konstruksi bukti dan berpikir kritis matematis mahasiswa pada perkuliahan struktur aljabar melalui guided discovery learning pendekatan motivation to reasoning and proving tasks

[Dissertation]. Bandung: Universitas Pendidikan Indonesia; 2014.

[3] Findel BR. Learning and understanding in abstract algebra [Dissertation]. University of New Hampshire, New Hampshire; 2001.

[4] Arnawa IM, Yerizon Y, Enita S. Improvement students’ level of proof ability in abstract algebra through APOS theory approach. International Journal of Scientific & Technology Research. 2019;8(7):128-131.

[5] Hanna G, Jahnke HN, Pulte H. Explanation and proof in mathematics. New York: Springer; 2010.

[6] Maya R, Sumarmo U. Mathematical understanding and proving abilities: Experiment with undergraduate student by using modified Moore learning approach. Journal on Mathematics Education. 2011;2(2):231-250.

[7] Selden A, Selden J. Validations of proof considered as texts: Can undergraduates tell whether an argument proves a theorem? Journal for Research in Mathematics Education. 2003;34(1):4-36.

[8] Stylianides GJ, Stylianides AJ, Philippou GN. Preservice teachers’ knowledge of proof by mathematical induction. Journal of Mathematics Teacher Education. 2007;10(3):145-166.

[9] Ozdemir E, Ovez FTD. A research on proof perceptions and attitudes towards proof and proving: Some implications for elementary mathematics prospective teachers. Procedia-Social and Behavioral Sciences. 2012;46:2121–2125.

[10] S. Cyr, “DEVELOPMENT OF BEGINNING SKILLS IN PROVING AND PROOF-WRITING BY ELEMENTARY SCHOOL STUDENTS.,” In: M. Pytlak, T. Rowland, and E. Swoboda, Eds. Proceedings of the Seventh Congress of the European Society for Research in Mathematics Education. pp. 263–272. University of Rzeszów, Poland (2011).

[11] G. Güler, “The Difficulties Experienced in Teaching Proof to Prospective Mathematics Teachers: Academician Views.,” Higher Education Studies. vol. 6, no. 1, pp. 145–158, 2016.

[12] Hart EW. Research issues in undergraduate mathematics learning. Kaput JJ, Dubinsky D, editors. Washington: American Mathematical Society; 1994.

[13] Moore RC. Making the transition to formal proof. Educational Studies in Mathematics. 1994;27(3):249-266.

[14] Race P. 500 tips for open and online learning. 500 tips. Taylor & Francis, London; 2008.

[15] Campbell M, Gibson W, Hall A, Richards D, Callery P. Online vs face-to-face discussion in a webbased research methods course for postgraduate nursing students: A quasiexperimental study. International Journal of Nursing Studies. 2008;45(5):750-759.

[16] A. Kitchenham, Blended Learning across Disciplines: Models for Implementation. IGI Global, Pennsylvania , 2011..

[17] Cohen L, Manion L, Morrison K. Research methods in education. London: Routledge; 2007.

[18] Ranjan P. Is blended learning better than online learning for B.Ed students? Journal of Learning for Development. 2020;7(3):349-366.

[19] Smith JG, Suzuki S. Embedded blended learning within an algebra classroom: A multimedia capture experiment. Journal of Computer Assisted Learning. 2015;31(2):133-147.

[20] Beile PM, Boote DN. Library instruction and graduate professional development: Exploring the effect of learning environments on self-efficacy and learning outcomes. Alberta Journal of Educational Research. 2002;48(4):364–367.

[21] W.L.P. Ruchti and M. Odell, Comparison and evaluation of online and classroom instruction in elementary science teaching methods courses. University of Idaho, Idaho , 2001..

[22] Gaddis B, Napierkowski H, Guzman N, Muth R. A comparison of collaborative learning and audience awareness in two computer-mediated writing environments. Paper presented at: 1st Annual Conference ESRC Teaching and Learning Research Programme (TLRP), National Convention of the Association for Educational Communications and Technology; 1-3 Feb 2000; Denver, United States.

[23] Caldwell ER. A comparative study of three instructional modalities in a computer programming course: Traditional instruction, web-based instruction, and online instruction

[Ph.D thesis] University of North Carolina at Greensboro; 2006.

[24] Scoville SA, Buskirk TD. Traditional and virtual microscopy compared experimentally in a classroom setting. Clinical Anatomy. 2007;20(5):565-570.

[25] McNamara JM, Swalm RL, Stearne DJ, Covassin TM. Online weight training. Journal of Strength and Conditioning Research. 2008;22(4):1164-1168.

[26] Weber K. Student difficulty in constructing proofs: The need for strategic knowledge. Education Studies in Mathematics. 2001;48:101-119.

[27] Weber K. Students’ difficulties with proof. Mathematical Association of America, Washington, 2003. Available at: https://www.maa.org/programs/faculty-anddepartments/ curriculum-department-guidelines-recommendations/teaching-andlearning/ research-sampler-8-students-difficulties-with-proof

[28] Harel G, Sowder L. Second handbook of research on mathematical teaching and learning. Lester F, editor. Washington, DC: National Council of Teachers of Mathematics 2007.

[29] Agustyaningrum N, Asmaul H, Yudhi H, Agus MA, Ali M. Analysis of mathematical proof ability in abstract algebra course. Universal Journal of Educational Research. 2020;8(3):823-834.

[30] A.S. Pramasdyahsari and M.R. Rubowo, “PEMAHAMAN KONSEP GRUP MAHASISWA CALON GURU MATEMATIKA DENGAN KEMAMPUAN MATEMATIKA TINGGI.,” Prismatika: Jurnal Pendidikan dan Riset Matematika. vol. 2, no. 2, pp. 71–84, 2020.

[31] Pramasdyahsari AS, Setyawati RD, Albab IU. Connecting university mathematics and school mathematics to address Klein’s double discontinuity: A case of ring theory. Beta: Jurnal Tadris Matematika. 2019;12(2):122–132. https://doi.org/10.20414/betajtm.v12i2.336

[32] Zazkis R, Sinclair N and Liljedahl, P. Lesson play in mathematics education: A tool for research and professional development. Dordrecht: Springer; 2013.

[33] A.S. Pramasdyahsari, “Developing the scripting task for mathematical connection between the university and school mathematics content.,” Journal of Physics: Conference Series. vol. 1957, no. 1, pp. 1–8, 2021..

[34] Suominen AL. Abstract algebra and secondary school mathematics: Identifying and classifying mathematical connections [Dissertation]. University of Georgia, Athens - USA; 2015.

[35] Saefudin AA. Pengembangan kemampuan berpikir kreatif siswa dalam pembelajaran matematika dengan pendekatan pendidikan matematika realistik Indonesia (PMRI). Jurnal Al-Bidayah. 2012;4(1):37-48.

[36] S. Fadillah and J. Jamilah, “PENGEMBANGAN BAHAN AJAR STRUKTUR ALJABAR UNTUK MENINGKATKAN KEMAMPUAN PEMBUKTIAN MATEMATIS MAHASISWA.,” Jurnal Cakrawala Pendidikan. vol. 1, no. 1, pp. 106–113, 2016

[37] S. Chamundeswari, “Conceptual Errors Encountered in Mathematical Operations in Algebra among Students at the Secondary Level.,” IJISET-International Journal of Innovative Science, Engineering & Technology. vol. 1, no. 8, pp. 24–38, 2014