Razali, Yasmin Syafikah, Husnul Azan Tajarudin, and Zawawi Daud. “Extraction of Volatile Fatty Acids from Leachate via Liquid-Liquid Extraction and Adsorption Method”. International Journal of Integrated Engineering 10, no. 9 (January 1, 2019). Accessed April 1, 2020. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/2443.