Duman, Ekrem Ziya, and Gamze Aslan. “An Investigation into the Logic Textbooks Written in Accordance With the 2009 Logic Curriculum”. Asian Journal of Education and Training 5, no. 1 (March 27, 2019): 166–175. Accessed May 4, 2024. http://www.asianonlinejournals.com/index.php/EDU/article/view/400.