Situmorang, L., and U. Sudharmono. “Tingkat Kecemasan Perawat Instalasi Gawat Darurat Terhadap Resiko Paparan Covid-19”. Jurnal Penelitian Perawat Profesional, Vol. 3, no. 4, Dec. 2021, pp. 799-06, doi:10.37287/jppp.v3i4.692.