Andria 2020. Knowledge of Pregnant Women About Covid - 19 in Rambah Tengah Hilir Village, Rambah District, Rokan Hulu Regency: PENGETAHUAN IBU HAMIL TENTANG PENYAKIT COVID – 19 DIDESA RAMBAH TENGAH HILIR KABUPATEN ROKAN HULU. Jurnal Martenity and Neonatal. 3, 2 (Sep. 2020), 109–116.