Ainusyarifah, Ani Nurhaeni and Sumarni (2019) “The Duration Of Second Period Is Based On The Parity Of The Maternity InThe Working Area Of Cangkol Public Health CenterCirebon City 2018”, Jurnal Kesehatan Mahardika. Indonesia, 6(2), pp. 1–4. doi: 10.54867/jkm.v6i2.39.