Jaqin, Nur, et al. “Increasing of Pregnancy Education on the Self Efficacy of Pregnant Women in Groups Accompanied by Their Husbands and Groups Unaccompanied Husband in Gowa Regency”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 44, no. 1, Feb. 2019, pp. 33-42, https://www.gssrr.org/JournalOfBasicAndApplied/article/view/9803.