Phetrada Khumsup และ Nattaya Ngamrojanavanich. (2016) Preparation of chitosan beads containing and control releasing of saponin against golden apple snail Pomacea canaliculata. Chulalongkorn University:ม.ป.ท.Phetrada Khumsup และ Nattaya Ngamrojanavanich. 2016. Preparation of chitosan beads containing and control releasing of saponin against golden apple snail Pomacea canaliculata. ม.ป.ท.:Chulalongkorn University;Phetrada Khumsup และ Nattaya Ngamrojanavanich. Preparation of chitosan beads containing and control releasing of saponin against golden apple snail Pomacea canaliculata. ม.ป.ท.:Chulalongkorn University, 2016. Print.