Ernawati, Tutik, Saptawati Bardosono, and Rini Sekartini. “Serum Folate Levels Among Healthy Infants Aged 6-8 Months: Relation to infants’ Nutritional Status Indicators and Maternal Knowledge-Attitude-Practice”. Medical Journal of Indonesia 20, no. 2 (May 1, 2011): 138-42. Accessed October 2, 2022. https://mji.ui.ac.id/journal/index.php/mji/article/view/443.