Tas’au, T., L. Jutomo, S. Toy, and R. Riwu. “The Correlation Between Body Mass Index, Physical Activity, and The Degree of Premenstrual Syndrome”. Lontar : Journal of Community Health, Vol. 3, no. 2, June 2021, pp. 89-95, doi:10.35508/ljch.v3i2.4156.