Borrirukwanit, K., P. Jindajumnong, S. Pomyen, K. Junhmaun, K. Yusuk, T. Seewan, and C. Thayawiwat. “Effect of Maneevej Sitting Position Technique on Labour Pain Level, Duration Time of Delivery and Blood Loss in Normal Labour”. Journal of Health Science of Thailand, vol. 28, no. 3, June 2019, pp. 455-6, https://thaidj.org/index.php/JHS/article/view/7192.