Boseren, Selina, et al. “Determinants Affecting Performance of Village Midwife in Biak Numfor Regency”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 24, no. 6, Nov. 2015, pp. 419-25, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/4983.