Sittiruk Pitpreecha และ Siriporn Damrongsakkul. (2005) Gelatin production from large animal raw hide using proteolytic enzyme extracted from papaya latex. Chulalongkorn University:ม.ป.ท.Sittiruk Pitpreecha และ Siriporn Damrongsakkul. 2005. Gelatin production from large animal raw hide using proteolytic enzyme extracted from papaya latex. ม.ป.ท.:Chulalongkorn University;Sittiruk Pitpreecha และ Siriporn Damrongsakkul. Gelatin production from large animal raw hide using proteolytic enzyme extracted from papaya latex. ม.ป.ท.:Chulalongkorn University, 2005. Print.