Boumedyen Shannaq, Fouad Jameel Ibrahim Alazzawi. “ Three-Sigma Scale Model for Measuring Student Interest in Social Media-Effective Tool for Improving the Educational Process in the Coronavirus (Covid-19) Period”. International Journal of Advanced Science and Technology, Vol. 29, no. 3, Mar. 2020, pp. 13597 -09, http://sersc.org/journals/index.php/IJAST/article/view/31690.