Oke, S.A., O.E. Charles-Owaba, and I.O. Popoola. “APPLICATION OF PROFITABILITY CONCEPT: A CASE IN THE PLASTIC RECYCLING INDUSTRY”. The South African Journal of Industrial Engineering 18, no. 1 (November 5, 2011). Accessed May 4, 2024. http://sajie.journals.ac.za/pub/article/view/131.