Zain, F. ul, S. J. Hussain, F. Shaheen, A. Qadir, and J. Junejo. “BIRTH ORDER AND PSYCHIATRIC MORBIDITY”. KHYBER MEDICAL UNIVERSITY JOURNAL, vol. 6, no. 4, Dec. 2014, pp. 167-71, https://www.kmuj.kmu.edu.pk/article/view/13401.