Putra Teruna, Billy, et al. “The Overview of Student Knowledge about The Importance of Inverted Pyramid Antenatal Care at Faculty of Medicine, Universitas Sumatera Utara: Gambaran Pengetahuan Mahasiswa Tentang Pentingnya Antenatal Care Piramida Terbalik Di Fakultas Kedokteran, Universitas Sumatera Utara”. Sumatera Medical Journal, vol. 5, no. 1, Jan. 2022, doi:10.32734/sumej.v5i1.7846.