กางการ ฐ. “Effect of Nipple Stimulation Program on Mothers’ Breast – Milk Volume of Preterm Infants”. Kuakarun Journal of Nursing, vol. 21, no. SUPP, Feb. 2015, pp. 204-18, https://he01.tci-thaijo.org/index.php/kcn/article/view/31103.