Panjaitan, H.C., Burdam, F.J. and Nanlohy, M.F.P. 2021. Ketepatan pemberian solidaritas covid-19 terhadap lanjut usia (lansia). Jurnal Cakrawala Promkes. 3, 1 (Mar. 2021), 1–8. DOI:https://doi.org/10.12928/promkes.v3i1.2765.