tambunan yansen parlaungan, Maryen Y, Mobalen O, Situmorang P. PENGARUH AUDIOVISUAL TERHADAP PENINGKATAN PENGETAHUAN KEPALA KELUARGA DALAM MELAKSANAKAN CUCI TANGAN PAKAI SABUN (AUDIOVISUAL EFFECT ON KNOWLEDGE IMPROVEMENT OF FAMILY HEADS IN IMPLEMENTING HAND WASHING WITH SOAP). pannmed [Internet]. 2021 May 7 [cited 2025 Sep. 21];16(1):26-31. Available from: https://ojs.poltekkes-medan.ac.id/pannmed/article/view/1035