Ittipon Worapun และผู้แต่งคนอื่นๆ. (2010) Synthesis of biodiesel by two-step transesterification from crude jatropha curcus L.oil using ultrasonic irradiation assisted. <i>KKU Engineering Journal</i>, <i>37</i>(3), 169-179.Ittipon Worapun และผู้แต่งคนอื่นๆ. "Synthesis of biodiesel by two-step transesterification from crude jatropha curcus L.oil using ultrasonic irradiation assisted". KKU Engineering Journal 37 (2010):169-179.Ittipon Worapun และผู้แต่งคนอื่นๆ. Synthesis of biodiesel by two-step transesterification from crude jatropha curcus L.oil using ultrasonic irradiation assisted. Faculty of Engineering, Khon Kaen Univeristy:ม.ป.ท. 2010.