“THE RELATIONSHIP OF PREGNANCY EXERCISE TO PERINEAL RUPTURE AMONG PRIMIPAROUS WOMEN AT PMB DINCE SAFRINA OF PEKANBARU IN 2015 -2018”. JURNAL IBU DAN ANAK, vol. 13, no. 2, June 2020, https://jurnal.polkesri.ac.id/index.php/JIA/article/view/285.