Aekorn Sampson. 2011. Evaluation of knowledge and attitudes of upper secondary school students in Chiang Mai on sex education in the health and physical education subject area in the basic education curriculum 2001. Chiang Mai:Chiang Mai University;
Aekorn Sampson. (2011) Evaluation of knowledge and attitudes of upper secondary school students in Chiang Mai on sex education in the health and physical education subject area in the basic education curriculum 2001 (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.
Aekorn Sampson. Evaluation of knowledge and attitudes of upper secondary school students in Chiang Mai on sex education in the health and physical education subject area in the basic education curriculum 2001. Chiang Mai:Chiang Mai University, 2011.
Aekorn Sampson. (2011) Evaluation of knowledge and attitudes of upper secondary school students in Chiang Mai on sex education in the health and physical education subject area in the basic education curriculum 2001 (รายงานผลงานวิจัย). Chiang Mai University:Chiang Mai.