Wattanaruangkowit, W. “Vaginal Birth After Cesarean Section (VBAC) at Yasothon Hospital: A12 Year Descriptive and Retrospective Analytic Study”. Journal of Health Science of Thailand, vol. 17, no. Sup.3, Nov. 2018, pp. SIII676-682, https://thaidj.org/index.php/JHS/article/view/5108.