D. Dangdee, A. Ratinthorn, C. Yusamran, and S. Kovitcharoenkul, “Effect of Acupressure at LI4 and BL32 on Labor Pain in the First Stage of Labor in Primigravidarum”, ์Nurs Sci J Thail, vol. 33, no. 4, pp. 15–26, Dec. 2015.