Bara’u, Rabi, and Ramatu Ibrahim Suleiman. “Analysis of the Theories Purposes, Functions and Methods of Supervision: Yesterday, Today and Tomorrow”. African Journal of Humanities and Contemporary Education Research 10, no. 1 (April 5, 2023): 244–252. Accessed October 27, 2026. https://publications.afropolitanjournals.com/index.php/ajhcer/article/view/393.