Seo, J.W., Kim, Y.J., Lee, K.H., Kim, J.Y., Sim, J.G., Kim, H.S., et al. (2002) A survey on the understanding of breast-feeding in pregnant woman. Journal of the Korean Pediatric Society, 45, 575-587.
 Gray-Donald, K., Kramer, M.S., Munday, S. and Leduc, D.G. (1985) Effect of formula supplementation in the hospital on the duration of breast-feeding: A controlled clinical trial. Pediatrics, 75, 514-518.
 Park, J.H., Park, Y.G., Jun, H.R., Park, S.W., Lee, J.Y., Hwang, S.G., et al. (1999) Impact of delivery method and feeding supervision on breastfeeding. Journal of the Korean Society of Maternal and Child Health, 3, 7-21.
 Suh, Y.S. and Lee, E.S. (1998) The effect of breast feeding promotion program on the changes in confidence towards the breast feeding practice. Journal of the Korean Society of Maternal and Child Health, 2, 13-27.
 Ryu, A.L., Kim, T.H. and Lee, H.H. (2010) Evaluation of risk factors for the postpartum depression with Edinburgh Postnatal Depression Scale (EPDS) score. Korean Journal of Perinatology, 21, 74-80.