Shamdas, Gamar. “Motivation, Self-Efficiency, and Academic Achievement Private Teacher Professional Education Students in Differentiated Learning Courses”. Journal of Education Reseach and Evaluation 7, no. 4 (Desember 23, 2023): 729–738. Diakses Juli 17, 2024. https://ejournal.undiksha.ac.id/index.php/JERE/article/view/62814.