Adamu , Iklimatu Umar, Ibrahim Abubakar, and Yusuf Sani Muhammad. “The Impact of Collection Period on Profitability of Nigerian Listed Oil and Gas Companies”. International Journal of Intellectual Discourse 3, no. 2 (December 31, 2020). Accessed June 29, 2025. https://www.ijidjournal.org/index.php/ijid/article/view/808.