Sittiboonma, N., & Sota, C. (2018). The Effect of Health Education Program by Applying Protection Motivation Theory and Social Support Theory for Adolescent Pregnancy Prevention among Muttayomsuksa 5 student in a school, Khon Kaen Province. Thai Journal of Health Education, 40(1), 12–23. retrieved from https://he01.tci-thaijo.org/index.php/muhed/article/view/135595