Sawarng Pupatwibul. 1992. A prototype for teaching ecology in Thai language through interactive video. Department of Curriculum and Instruction, Illinois State University;
Sawarng Pupatwibul. (1992) A prototype for teaching ecology in Thai language through interactive video . Illinois State University/Illinois.
Sawarng Pupatwibul. A prototype for teaching ecology in Thai language through interactive video. . Illinois:Illinois State University, 1992.
Sawarng Pupatwibul. (1992) A prototype for teaching ecology in Thai language through interactive video . Illinois State University/Illinois.