Watcharat Ngamsa-ard และ Jirdsak Tscheikuna. (2008) Production of methyl esters from palm oil with high content of free fatty acids. Chulalongkorn University:ม.ป.ท.Watcharat Ngamsa-ard และ Jirdsak Tscheikuna. 2008. Production of methyl esters from palm oil with high content of free fatty acids. ม.ป.ท.:Chulalongkorn University;Watcharat Ngamsa-ard และ Jirdsak Tscheikuna. Production of methyl esters from palm oil with high content of free fatty acids. ม.ป.ท.:Chulalongkorn University, 2008. Print.