1.
Simanjuntak NH. Pencegahan Covid-19 Pada Pemuda GBIS Kristus Pengharapan Medan . J-I-P-M-A-S [Internet]. 2021Feb.28 [cited 2024May8];2(1):14-22. Available from: https://ejournal.uhn.ac.id/index.php/pengabdian/article/view/88