Sitompul, Jos Iswadi, Anak Agung Sagung Sawitri, and Dyah Pradnyaparamita Duarsa. “Refusal of COVID-19 Booster Vaccination Among People Living in Remote Tourism Area, Samosir, Indonesia”. Public Health and Preventive Medicine Archive 11, no. 2 (December 31, 2023): 166–178. Accessed April 29, 2026. http://phpmarchive.org/index.php/phpma/article/view/336.