IskandarR., R DjanoN. A., and TahirR. “The Correlation Between Second Stage (Childbearing) Family Development Task With Completeness of Polio Immunization in Working Area of Wara Utara KotaPublic Health Center in 2018”. Journal of Health Science and Prevention, Vol. 3, no. 3S, Dec. 2019, pp. 52-56, doi:10.29080/jhsp.v3i3S.281.