Lubis, N. A., Sihombing, J. sion, Siahaan, M. F., Dewi, N. A., & Herawati, N. (2025). THE RELATIONSHIP OF PHYSICAL ACTIVITY LEVEL AND LENGTH OF WORKING TIME TO THE MENSTRUAL CYCLE IN FEMALE WORKERS. Algebra : Jurnal Pendidikan, Sosial Dan Sains, 5(2), 371–375. https://doi.org/10.58432/algebra.v5i2.1456