Faridah, A. (2016) “Comperation of Porang Flour (morphophallus muelleri) Purification Method : Conventional Maceration (gradient ethanol leaching) and Ultrasonic Maceration Method using Response Surface Methodology”, International Journal on Advanced Science, Engineering and Information Technology, 6(2), pp. 265–272. doi: 10.18517/ijaseit.6.2.769.