Hidayah Azeman, Nur, Nor Azah Yusof, and Ahmad Izzat Othman. “Detection of Free Fatty Acid in Crude Palm Oil: A Review”. Asian Journal of Chemistry 27, no. 5 (February 20, 2015): 1569–1573. Accessed July 18, 2024. https://asianpubs.org/index.php/ajchem/article/view/27_5_1.