D. . Putri Septi K, S. . Phanata, K. . Indah Setyo Rahayu, D. Prasetyo Adi, Q. . Avenida, and J. . Nastiti Sandyaningrum, “Proficiency Test Training for Mandarin Learners in Surakarta”, KSS, vol. 7, no. 17, pp. 1–9, Nov. 2022.