(2017). . Kirkuk Journal of Science, 12(1), 109-122. doi: 10.32894/kujss.2017.124855
. "". Kirkuk Journal of Science, 12, 1, 2017, 109-122. doi: 10.32894/kujss.2017.124855
(2017). '', Kirkuk Journal of Science, 12(1), pp. 109-122. doi: 10.32894/kujss.2017.124855
. Kirkuk Journal of Science, 2017; 12(1): 109-122. doi: 10.32894/kujss.2017.124855