Ekasari, Marlita Putri, Ragil Setia Dianingati, and Lili Nur Indah Sari. “Cost of COVID-19 Mass Vaccination at Ngampilan Health Center Yogyakarta”. Indonesian Journal of Pharmacy 36, no. 2 (June 23, 2025): 360-370. Accessed August 26, 2025. https://journal.ugm.ac.id/v3/IJP/article/view/6232.