Asriati, A., M. Syafar, A. A. A., and S. Sirajuddin. “Effect of Antenatal Education Model Base on Problem Toward Knowledge of KEK Pregnant Women and Birth Weight”. International Journal of Sciences: Basic and Applied Research (IJSBAR), vol. 30, no. 3, Nov. 2016, pp. 248-54, https://www.gssrr.org/index.php/JournalOfBasicAndApplied/article/view/6608.