Ogbonnaya, I. C., Mji, A., Mafa-Theledi, O. N., & Ngulube, B. (2020). Economics Teachers’ Topic Specific Pedagogical Content Knowledge Model for teaching Market Dynamics. International Journal of Learning, Teaching and Educational Research, 19(7), 320–341. Retrieved from http://www.ijlter.net/index.php/ijlter/article/view/300