Kumalaningrum, M., E. P. Pamungkasari, and I. D. A. Nurhaeni. “Multilevel Analysis on the Predictors of Safe Sexual Behavior Among Girl Adolescents in Karanganyar, Central Java”. Journal of Health Promotion and Behavior, vol. 2, no. 4, Jan. 2018, pp. 323-31, https://thejhpb.com/index.php/thejhpb/article/view/62.