Haji Badre, Jirwan S., and Diyar A. Saeed Halo. “The Development of Critical Thinking Skills Among Students of University of Zakho Faculty of Humanities : According to Gender and Mother Tongue Variables”. KOYA UNIVERSITY JOURNAL OF HUMANITIES AND SOCIAL SCIENCES, vol. 4, no. 2, Dec. 2021, pp. 105-14, doi:10.14500/kujhss.v4n2y2021.pp105-114.