Mulyono, Panut, Sofiyah Sofiyah, and Ahmad Muhajir Kahuripan. 2010. “Equilibrium in the Reactive Extraction of Aqueous Phenol Using Tributyl Phospate in N-Hexane”. ASEAN Journal of Chemical Engineering 10 (2), 16-24. https://journal.ugm.ac.id/v3/AJChE/article/view/8067.