Aviandari, T., E. P. Pamungkasari, and B. Murti. “Management Analysis of the Implementation of Covid-19 Vaccination in Reducing Positivity Rate in Regency Health Office of Boyolali, Central Java”. Journal of Health Policy and Management, vol. 6, no. 3, Sept. 2021, pp. 190-02, https://thejhpm.com/index.php/thejhpm/article/view/243.