Abdel Hamza Al-Zalzali, A. G. “Grammar Thinking Skills and Their Relationship to the Levels of Cognitive Processing of Preparatory Stage Students”. Journal of Tikrit University for Humanities, vol. 29, no. 11, 1, Nov. 2022, pp. 416-37, doi:10.25130/jtuh.29.11.1.2022.20.