Mohammad Amin Mozaheb and  Jalal Farzaneh Dehkordi and  Khojasteh Hosseinzadehpilehvar,  A CDA-Driven Study of World English Series Published by Cengage Heinle .   journal   = {International Journal of Humanities and Social Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2018, vol. 133(1). 92 - 95
    [viewed 06 December 2021]. Available from: https://publications.waset.org/pdf/10008438.