Ruth Rejeki Sianturi, S, et al. “Relation of Number of Living Children and Long-Acting and Permanent Contraceptive Methods in West Nusa Tenggara Province (ICMM 2015)”. KnE Life Sciences, vol. 4, no. 10, Feb. 2019, pp. 277–283, doi:10.18502/kls.v4i10.3730.