1. Al-Amri, S. (2008). Computer-based testing vs. paper-based testing: A comprehensive approach to examining the comparability of testing modes. Essex Graduate Student Papers in Language and Linguistics, 10, 22-44. Retrieved January 28, 2012 from http://www.essex.ac.uk/linguistics/publications/egspll/volume_10/pdf/EGSPLL10_22-44SAA_web.pdf.
2. Allen, M.J., Yen, W.M. (1979). Introduction to measurement theory. Monterey, CA: Brooks/Cole.
3. The equivalent of paper-and-pencil and computer-based testings;Bugbee;Journal of Research on Computing in Education,1996
4. Bunderson, C.V., Inouye, D.K., & Olsen, J.B. (1989). The four generations of computerized educational measurement. In R. L. Linn (Ed.), Educational Measurement (pp. 367-407). Washington, DC: American Council on Education.
5. Comparability of a paper-based language test and a computer- based language test;Choi;Language Testing,2003