Borja, Josephine Q., Marylou M. Uy, Jose Salvador Lim, Matthew Edson Ong, and Alejandro Miguel Ros. 2014. “Microwave – Assisted Extraction of Chlorogenic Acid from Coffee Liberica L”. ASEAN Journal of Chemical Engineering 14 (2), 58-66. https://dev.journal.ugm.ac.id/v3/AJChE/article/view/8853.