Wittawat Saenkhumwong และ Amnart Suksri. (2017) The improved dielectric properties of natural ester oil by using ZnO and TiO2 nanoparticles. <i>Engineering and Applied Science Research</i>, <i>44</i>(3), 148-153.Wittawat Saenkhumwong และ Amnart Suksri. "The improved dielectric properties of natural ester oil by using ZnO and TiO2 nanoparticles". Engineering and Applied Science Research 44 (2017):148-153.Wittawat Saenkhumwong และ Amnart Suksri. The improved dielectric properties of natural ester oil by using ZnO and TiO2 nanoparticles. Faculty of Engineering, Khon Kaen University:ม.ป.ท. 2017.