Simamora, A.A. and Sagala, N.S. 2021. Efektivitas Pendidikan Kesehatan dengan Pendekatan Health Belief Model terhadap Pengetahuan Lansia Tentang Covid-19 : The Effectiveness of Health Education With the Health Belief Model Approach to Elderly Knowledge About Covid-19. Media Publikasi Promosi Kesehatan Indonesia (MPPKI). 4, 4 (Nov. 2021), 470-474. DOI:https://doi.org/10.56338/mppki.v4i4.1914.