Dumminsek , P., K. Kantaruksa, and N. . Chaloumsuk. “Effectiveness of Childbirth Self-Efficacy Promotion Among Pregnant Women: A Systematic Review”. Nursing Journal CMU, vol. 47, no. 4, Dec. 2020, pp. 203-15, https://he02.tci-thaijo.org/index.php/cmunursing/article/view/247943.