Silalahi, Yetti Fauziah. “The Effect of Peer Group Health Education on Anxiety Levels in Young Women in Facing Menarche at SD IT Ummi Aida Medan”. Science Midwifery, vol. 9, no. 1, Oktober, Oct. 2020, pp. 136-9, https://midwifery.iocspublisher.org/index.php/midwifery/article/view/53.