Thongnat, W., S. Siriarunrat, and T. Tachasuksri. “Effects of Postpartum Hemorrhage Prevention Program on Postpartum Blood Loss and Outcomes of Labor Among Low Risk Nulliparous Women”. Journal of Phrapokklao Nursing College, Chanthaburi, vol. 32, no. 2, Dec. 2021, pp. 37–53, https://he01.tci-thaijo.org/index.php/pnc/article/view/241181.