Fauziah, S.H., and P. Agamuthu. “A Case Study of Waste Auditing in an Oleochemical Plant”. Malaysian Journal of Science 20, no. 1 (December 27, 2001): 1–7. Accessed January 6, 2025. http://borneojournal.um.edu.my/index.php/MJS/article/view/8768.