Punyawadee Thongkeaw. 2007. Evaluation of knowledge, attitude, and behavior of secondary school students in Chumphon province, Thailand according to Ministry of Education's guidelines on sexual educationPunyawadee Thongkeaw. Field of Study Human Reproduction and Population Planning, Mahidol University;
Punyawadee Thongkeaw. (2007) Evaluation of knowledge, attitude, and behavior of secondary school students in Chumphon province, Thailand according to Ministry of Education's guidelines on sexual educationPunyawadee Thongkeaw . Mahidol University/Bangkok.
Punyawadee Thongkeaw. Evaluation of knowledge, attitude, and behavior of secondary school students in Chumphon province, Thailand according to Ministry of Education's guidelines on sexual educationPunyawadee Thongkeaw. . Bangkok:Mahidol University, 2007.
Punyawadee Thongkeaw. (2007) Evaluation of knowledge, attitude, and behavior of secondary school students in Chumphon province, Thailand according to Ministry of Education's guidelines on sexual educationPunyawadee Thongkeaw . Mahidol University/Bangkok.