Katekaew Seangpraw และ Vanvisa Sresumatchai. (2016) Knowledge, Attitude, Perceived Self-Efficacy and Behavior Related to Sexual Risk Behavior among University Students in North Thailand. <i>Journal of Health Research</i>, <i>30</i>(2), 127.Katekaew Seangpraw และ Vanvisa Sresumatchai. "Knowledge, Attitude, Perceived Self-Efficacy and Behavior Related to Sexual Risk Behavior among University Students in North Thailand". Journal of Health Research 30 (2016):127.Katekaew Seangpraw และ Vanvisa Sresumatchai. Knowledge, Attitude, Perceived Self-Efficacy and Behavior Related to Sexual Risk Behavior among University Students in North Thailand. Chulalongkorn University Press:ม.ป.ท. 2016.