Purba, Stevani, and Denny Ricky. 2021. “Tingkat Pengetahuan Masyarakat Tentang Covid-19 Di Lingkungan III Kel. Perdagangan III”. Jurnal Penelitian Perawat Profesional 3 (3), 519-24. https://doi.org/10.37287/jppp.v3i3.533.