Wissam Aziz Shenawa Al-Saadi, and Riad Hamza Al-Bakri. “Suitability for Use and Their Role in Achieving Customer Satisfaction ”. Journal of Madenat Alelem University College, Vol. 8, no. 2, Dec. 2016, pp. 113-29, http://116.203.176.164/index.php/JMAUC/article/view/117.