Exconde, Theresa G., and Evangeline B. Escabel. “Assessment of Pedagogical Content Knowledge of Math Teachers: Basis for Professional Development Program”. International Journal of Research in Engineering, Science and Management 4, no. 7 (August 3, 2021): 414–420. Accessed December 3, 2024. https://journal.ijresm.com/index.php/ijresm/article/view/1126.