Ardiana, A., B. Utomo, K. Kasiati, and B. Purwanto. “PREGNANCY EXERCISE IMPACT TO PERINEAL TEAR IN NORMAL LABOR”. Indonesian Midwifery and Health Sciences Journal, vol. 4, no. 3, Oct. 2021, pp. 274-9, doi:10.20473/imhsj.v4i3.2020.274-279.