Primasari, Nessy Anggun, Erika Nurwidiyanti, and Alexius Krisbianto. “R Relationship Between Knowledge about Covid-19 and Vaccine Acceptance Behavior in the Elderly at Patuk 1 Wonosari Health Center Yogyakarta”. Journal of Nursing Invention 3, no. 1 (August 23, 2022): 53–60. Accessed April 4, 2025. https://ejurnal.unism.ac.id/index.php/JNI/article/view/165.