Zaen, Niasty Lasmy. “The Effect of Lemon Aromatherapy on Reducing the Pain Intensity on Post Sectio Caesarea Patients at Malahayati Islamic Hospital Medan in 2020”. Science Midwifery, vol. 9, no. 2, May 2021, pp. 466-9, https://www.midwifery.iocspublisher.org/index.php/midwifery/article/view/140.