Adebisi, Sunday Abayomi, Ohiani Salihu Adeku, and Adebowale Abiodun Oyedele. “System Theory and Effective Performance in a Changing Environment”. Unilag Journal of Humanities 6, no. 1 (April 30, 2019): 77-99. Accessed April 24, 2024. http://ujh.unilag.edu.ng/article/view/327.