Hastuti, Heni, Zahra Dzakiyatin Nisa, Husnia Auliyatul Umma, Anak Agung Alit Kirti Estuti Narendra Putri, and Yusuf Ari Mashuri. 2020. Journal of Maternal and Child Health 5 (3):297-303. https://thejmch.com/index.php/thejmch/article/view/334.