Syah, Farid Zulkarnain Nur, and Ambar Fidyasari. “The Effect of Combined Vitamin C, D, and Zinc Supplementation on the Length of Hospital Stay in COVID-19 Patients: A Clinical Nutrition Perspective: Pengaruh Kombinasi Vitamin C, D Dan Zinc Terhadap Lama Rawat Inap Pasien COVID-19: Tinjauan Dari Aspek Gizi Klinis ”. Journal of Tropical Food and Agroindustrial Technology 6, no. 02 (July 31, 2025): 72–77. Accessed August 2, 2025. https://jtfat.umsida.ac.id/index.php/jtfat/article/view/1656.