U. Silas, Nsanzumuhire, Dr. Habineza Faustin, Dr. Nahimana Marien, and Dr. Mpakaniye J. Paul. “Identification of Possible Strategies for Implementing PBL at INES-Ruhengeri: A Preliminary Study”. International Journal of Social Sciences and Humanities Invention 5, no. 6 (June 30, 2018): 4801–4807. Accessed November 26, 2024. https://valleyinternational.net/index.php/theijsshi/article/view/1268.