Chong, Chien wha, Chung Lim Law, Michael Wha Cloke, Luqman Chuah Abdullah, and Wan Ramli Wan Daud. 2009. “Kinetics of Mass Transfer, Colour, Total Polyphenol and Texture Change of Manilkara Zapota During Convective Air Drying”. ASEAN Journal of Chemical Engineering 9 (1), 47-58. https://jurnal.ugm.ac.id/v3/AJChE/article/view/7710.