Yumafita, T., S. S. Rahardjo, and R. B. Adriani. “Theory of Planned Behavior on Factors Affecting Tetanus Toksoid Immunization Uptake Among Pregnant Women in Boyolali, Central Java”. Journal of Maternal and Child Health, vol. 4, no. 3, May 2019, pp. 190-0, https://thejmch.com/index.php/thejmch/article/view/185.