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Nutrisia Nu'im Haiya, Ardian I. The Effectiveness of Audio Visual Media and Snakes and Ladders Washing Hands on Knowledge of School Age Children. J Keskom [Internet]. 2023 Jul. 26 [cited 2024 Nov. 23];9(2):231-9. Available from: https://jurnal.htp.ac.id/index.php/keskom/article/view/1398