Taher Salim, Bahzad, Sirwan Latif Haji, and Rizgar Saed Hussein. 2019. “Factors Affecting Customer Satisfaction in the Internet Service Industry (Exploratory Study of Internet Service Providers in Erbil - Kurdistan Region)”. Polytechnic Journal 9 (1):50-63. https://doi.org/10.25156/ptj.v9n1y2019.pp50-63.