Suharyanisa, Suharyanisa, Manahan Situmorang, and Dumartina Hutauruk. “SOSIALISASI PENTINGNYA VITAMIN D DAN BERJEMUR PAGI HARI TERHADAP PENGETAHUAN MASYARAKAT KELURAHAN MEDAN HELVETIA DI MASA PANDEMI COVID-19”. Jurnal Abdimas Mutiara 3, no. 1 (February 24, 2022): 376–379. Accessed January 30, 2026. https://e-journal.sari-mutiara.ac.id/index.php/JAM/article/view/2698.