Panaddar Phutthakham และ Tanawan Samleerat. (2017) Sexual behavior and attitudes regarding sexual transmitted disease among foreigners in Chiang Mai City Chiang Mai Province. <i>Journal of Associated Medical Sciences</i>, <i>50</i>(2), 159-167.Panaddar Phutthakham และ Tanawan Samleerat. "Sexual behavior and attitudes regarding sexual transmitted disease among foreigners in Chiang Mai City Chiang Mai Province". Journal of Associated Medical Sciences 50 (2017):159-167.Panaddar Phutthakham และ Tanawan Samleerat. Sexual behavior and attitudes regarding sexual transmitted disease among foreigners in Chiang Mai City Chiang Mai Province. Faculty of Associated Medical Sciences, Chiang Mai University:ม.ป.ท. 2017.