The Effect of Sex Education with Snakes and Ladders Methodtowards Knowledge of The Underwear Rule among First Grade Students of Kebonsari 1 Elementary SchoolTuban. jp stikesnu [Internet]. 2019 Jun. 2 [cited 2025 Jul. 20];1(1). Available from: https://ejournal.iiknutuban.ac.id/index.php/jp/article/view/26