yansen parlaungan tambunan, Y. . Maryen, O. Mobalen, and P. Situmorang, “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, vol. 16, no. 1, pp. 26–31, May 2021.