Ria Angelina Jessica Rotinsulu and Endang Puji Ati 2026. Knowledge about menstruation with readiness to face menarche of elementary school students in the era of reproductive health education. Jurnal Ilmiah Kesehatan Sandi Husada. 14, 1 (Apr. 2026), 174–182. DOI:https://doi.org/10.35816/jiksh.v14i1.322.