1. Beatty, K. (2003).Teaching and researching computer assisted language learning. New York: Longman.
2. Brant, J., Gonglewski, M., &Meloni, C. (2001). Using e-mail in foreign language teaching: rationale and suggestions. The Internet TESL Journal, 7(3). Retrieved from http://iteslj.org/Techniques/Meloni-Email.html.
3. Chapelle, C.A. (2001). Computer applications in second language acquisition. New York: Cambridge.
4. DeBard, R., &Guidera, S. (1999). Adapting asynchronous communication to meet the seven principles of effective teaching. Journal of Educational Technology Systems, 28(3) 219-239.
5. Fowler, W.S., &Coe, N. (1976).Nelson English language test. Nelson ELT.