Phanumas Seneesrisakul และ Usaneya Perngparn. (2017) Perception of Risk Behaviors Affected to Sexual Relationship among Teenagers. <i>Journal of Health Research</i>, <i>31</i>(suppl.1), s107.Phanumas Seneesrisakul และ Usaneya Perngparn. "Perception of Risk Behaviors Affected to Sexual Relationship among Teenagers". Journal of Health Research 31 (2017):s107.Phanumas Seneesrisakul และ Usaneya Perngparn. Perception of Risk Behaviors Affected to Sexual Relationship among Teenagers. Chulalongkorn University Press:ม.ป.ท. 2017.