LUBIS, EFRILAYANI, and Wahidiyah Sugiarti. 2021. “HUBUNGAN UMUR DAN PARITAS DENGAN KEJADIAN PARTUS LAMA DI RSB PERMATA HATI METRO TAHUN 2019: RELATIONSHIP OF AGE AND PARITY WITH THE EVENT OF OLD PARTUS AT PERMATA HATI METRO Hospital in 2019”. Bunda Edu-Midwifery Journal (BEMJ) 4 (1):23-30. https://bemj.e-journal.id/BEMJ/article/view/40.