Channa, S. ., S. . Nasreen, H. . Waheed, and A. . Yasmin. “Prevalance of Premenstrual Syndrome Among Women of Pakistan”. Journal of Bahria University Medical and Dental College, vol. 3, no. 1, June 2013, pp. 24-29, https://jbumdc.bahria.edu.pk/index.php/ojs/article/view/50.