Saragih HS, Gultom L. Training and Counselling of Sex Education as a Prevention for Sexual Risk Behaviour in Adolescents: A Quasi-experiment Study. JPK [Internet]. 2025 Sep. 3 [cited 2025 Nov. 2];13(2):138-46. Available from: https://e-journal.unair.ac.id/PROMKES/article/view/59091