Pertiwi, Galuh Tunjung, Hanung Prasetya, and Bhisma Murti. 2018. “The Contextual Effect of School on the Premarital Sex Among Adolescents in Bantul, Yogyakarta”. Journal of Health Promotion and Behavior 3 (4):240-47. https://thejhpb.com/index.php/thejhpb/article/view/150.