Tipawaro, wacnan, P. Angnanon, and S. Naka. “Breast Feeding Failure of Last Pregnancy in Pregnant Women at Ratchaburi Maternal and Child Hospital”. Region 4-5 Medical Journal, vol. 21, no. 1, Aug. 2018, pp. 19-29, https://he02.tci-thaijo.org/index.php/reg45/article/view/138887.