Siantar, Rupdi Lumban, et al. “Efectiveness of Celery (Apium Graveolens) on Hppertension in The Elderly”. Science Midwifery, vol. 9, no. 2, Apr. 2021, pp. 360-5, https://midwifery.iocspublisher.org/index.php/midwifery/article/view/113.