Mosese, Nthabiseng, and Ugorji I. Ogbonnaya. “GeoGebra and students’ Learning Achievement in Trigonometric Functions Graphs Representations and Interpretations”. Cypriot Journal of Educational Sciences 16, no. 2 (April 30, 2021): 827–846. Accessed April 19, 2024. https://www.un-pub.eu/ojs/index.php/cjes/article/view/5685.