Aryanti, Reni, et al. “The Relationship of Knowledge, Parity and Anxiety With the Event of Severe Preeclamsia in Hospital General of Wood Area 2021”. Science Midwifery, vol. 10, no. 2, Apr. 2022, pp. 858-62, https://midwifery.iocspublisher.org/index.php/midwifery/article/view/370.