“The Effect of Sex Education With Snakes and Ladders Methodtowards Knowledge of The Underwear Rule Among First Grade Students of Kebonsari 1 Elementary SchoolTuban”. Jurnal Penelitian Sekolah Tinggi Ilmu Kesehatan Nahdlatul Ulama Tuban 1, no. 1 (June 2, 2019). Accessed July 20, 2025. https://ejournal.iiknutuban.ac.id/index.php/jp/article/view/26.