WASET
    Israa A. Qari,  Evaluation of Pragmatic Information in an English Textbook: Focus on Requests.   journal   = {International Journal of Cognitive and Language Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2021, vol. 169(1). 144 - 148
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/10011792.