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 23 September 2024]. Available from: https://publications.waset.org/pdf/10008438.