Pornsawan Assawasaengrat. 2012. Dry wash biodiesel synthesis. Bangkok:King Mongkut's Institute of Technology Ladkrabang;
Pornsawan Assawasaengrat. (2012) Dry wash biodiesel synthesis (รายงานผลงานวิจัย). King Mongkut's Institute of Technology Ladkrabang:Bangkok.
Pornsawan Assawasaengrat. Dry wash biodiesel synthesis. Bangkok:King Mongkut's Institute of Technology Ladkrabang, 2012.
Pornsawan Assawasaengrat. (2012) Dry wash biodiesel synthesis (รายงานผลงานวิจัย). King Mongkut's Institute of Technology Ladkrabang:Bangkok.