Razak, N., Hashim, H., Yunus, A., Ghafar, F., & Zulkafli, N. (2016). Effects of Hygroscopic Potash Lye Catalyst Concentration on the Waste Chicken Fat Methyl Ester Production. Journal of Engineering and Technology (JET), 7(2), 103–109. Retrieved from https://jet.utem.edu.my/jet/article/view/1205