Ali Elsay, O. E., M. aBassuni Elshemy, and H. Elsays. “Effect of a Multi-Modal Preparation Package on Knowledge and Anxiety Among Patients Undergoing Cardiac Catheterization”. International Journal of Nursing Didactics, vol. 6, no. 01, Jan. 2016, pp. 01-12, http://nursingdidactics.com/index.php/ijnd/article/view/1829.