Kunya Pradprew. 2002. The development of cleaner technology training model in environmental management for students a case study : Nakhonnayok Technical College. Field of Study Appropriate Technology for Resource Development, Mahidol University;
Kunya Pradprew. (2002) The development of cleaner technology training model in environmental management for students a case study : Nakhonnayok Technical College . Mahidol University/Bangkok.
Kunya Pradprew. The development of cleaner technology training model in environmental management for students a case study : Nakhonnayok Technical College. . Bangkok:Mahidol University, 2002.
Kunya Pradprew. (2002) The development of cleaner technology training model in environmental management for students a case study : Nakhonnayok Technical College . Mahidol University/Bangkok.