R. Kundaryanti, K. Karningsih, H. Astri, and S. Syafrudin, “The Relationship Between Knowledge And Attitude Towards The Preventive Behaviors For The Covid-19 Transmission In Pregnant Mothers At ‘Rini K’ Independent Midwifery Practice (PMB), Jagakarsa, South Jakarta, 2021”, sjik, vol. 10, no. 2, pp. 1480–1486, Nov. 2021.