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.