Khuram Shahzad, Dr. Jameel Ahmed, Dr. Kaneez Fatima. “Identification of Informal Economic Sectors in Quetta City”. CEMJP, vol. 31, no. 4, Oct. 2023, pp. 102-18, http://journals.kozminski.cem-j.org/index.php/pl_cemj/article/view/1041.