Ifeanyi John Eneovo, and Theresa Chinyere Ogbuanya. “Effect Of Problem-Based Learning Method On Students’ Academic Achievement In Computer Hardware Maintenance In Universities In Enugu State, Nigeria”. The American Journal of Engineering and Technology 3, no. 11 (November 28, 2021): 24–33. Accessed October 9, 2025. https://theamericanjournals.com/index.php/tajet/article/view/2175.