Salesman, Frans. “The Effect of Maternal Education Level, Family Income, and Maternal Working Time to Basic Vaccine Service on 0-24 Infants in Kupang Regency, East Nusa Tenggara”. Journal of Health Policy and Management 2, no. 2 (November 20, 2017): 112–116. Accessed April 29, 2024. http://thejhpm.com/index.php/thejhpm/article/view/31.