Khairudin , Ahmad Fauzan , Armiati , Karmila Suryani. “Developing Hypothetical Learning Trajectory for Green’s Theorem”. International Journal of Advanced Science and Technology 29, no. 10s (May 10, 2020): 1300 - 1309. Accessed May 7, 2024. http://sersc.org/journals/index.php/IJAST/article/view/14628.