SEPDUWIANA, H., and M. -. “Knowledge and Assitude of Mothers Who Have Children under Life about Giving Vitamin A to Children under Life at Posyandu Sayang Balita Ujung Batu Subdistrict Working Area in Puskesmas Ujung Batu Period April – Mey 2010”. Jurnal Martenity and Neonatal, vol. 1, no. 1, Oct. 2014, pp. 38-48, https://e-journal.upp.ac.id/index.php/akbd/article/view/143.