Azizah Sormin, Masdelima, Darliana Sormin, Mira Rahma Yanti Sormin, Adek Kholijah, and Ihsan Siregar. 2023. “Development of Problem Based Mathematics Module (Calculating Professional Zakat) to Improve Student’s Mathematic Problem Solving”. KnE Social Sciences 8 (4), 292–298. https://doi.org/10.18502/kss.v8i4.12910.