1. Abunawas, M. (2014). A meta-analytic investigation of the predictive validity of the Test of English as a Foreign Language (TOEFL) scores on GPA [Unpublished doctoral dissertation]. Texas A&M. https://oaktrust.library.tamu.edu/bitstream/handle/1969.1/154156/%20ABUNAWAS-DISSERTATION-2014.pdf?sequence=1.
2. What does language testing have to offer?;Bachman;TESOL Quarterly,1991
3. What is the construct? The dialectic of abilities and contexts in defining constructs in language assessment;Bachman,2007
4. Brenzel, J. & Settles, B. (2017). The Duolingo English Test-Design, Validity, and Value. DET Whitepaper(Short). Retrieved from 〈https://englishtest.duolingo.com/resources〉.
5. Predicting grades from an English language assessment: The importance of peeling the onion;Bridgeman;Language Testing,2015