SITOHANG, Richard Jonathan; 						SIMBOLON, Idauli.
 HUBUNGAN TINGKAT PENGETAHUAN DAN TINGKAT KECEMASAN LANJUT USIA TERHADAP COVID-19.
<strong>Nutrix Journal</strong>, [S.l.], v. 5, n. 1, p. 56-64, apr. 2021.
ISSN 2580-6432.
Available at: &lt;<a href="https://ejournal.unklab.ac.id/index.php/nutrix/article/view/540" target="_new">https://ejournal.unklab.ac.id/index.php/nutrix/article/view/540</a>&gt;. Date accessed: 08 oct. 2025.
doi: <a href="https://doi.org/10.37771/nj.Vol5.Iss1.540">https://doi.org/10.37771/nj.Vol5.Iss1.540</a>.