Sukanya Subkerd และ Surachai Pornpakakul. (2008) Semi-continuous production of biodiesel from palm fatty acid using novozym 435. Chulalongkorn University:ม.ป.ท.Sukanya Subkerd และ Surachai Pornpakakul. 2008. Semi-continuous production of biodiesel from palm fatty acid using novozym 435. ม.ป.ท.:Chulalongkorn University;Sukanya Subkerd และ Surachai Pornpakakul. Semi-continuous production of biodiesel from palm fatty acid using novozym 435. ม.ป.ท.:Chulalongkorn University, 2008. Print.