Rajagukguk W. Evaluation of Calculus Learning Outcomes Based on Basic Ability, Attidude, and Motivation, of Students of Faculty of Mathematics and Natural Science of Medan State University. IJSBAR. 2017;32(3):246-257. Accessed September 21, 2025. https://gssrr.org/JournalOfBasicAndApplied/article/view/7179