Khalaf Al-Jubouri, A. W. H., and A. K. I. Al-Youssef. “the Effect of Approximation in the Similes of the Holy Quran”. Journal of Tikrit University for Humanities, vol. 25, no. 1, Jan. 2018, pp. 20-58, doi:10.25130/jtuh.25.1.2018.02.