Rangkuti, Saddiyah. “The Effect of Maternal Knowledge on the Prevention of Covid-19 Transmission at the Kota Pinang General Hospital”. Science Midwifery 9, no. 1, Oktober (August 26, 2021): 216–223. Accessed April 17, 2026. https://midwifery.iocspublisher.org/index.php/midwifery/article/view/151.