Sadiku, Matthew N. O., Uwakwe C. Chukwu, and Janet O. Sadiku. “Characteristics of Selfishness”. American Journal of Social and Humanitarian Research 4, no. 12 (December 9, 2023): 27–34. Accessed July 28, 2025. https://www.globalresearchnetwork.us/index.php/ajshr/article/view/2608.