References :

Krashen, S. D. (1982). Principles and Practice in Second Language Acquisition. London: Pergamon.

Tsutsui, M., Kato, M., & Mohr, B. (1999). Closing the gap between practice environments and reality: An Interactive Multimedia Program for Oral Communication Training in Japanese" Exeter CALL Paper: Part 1. Theory.

Wakabayashi, S., & Morishita, J. (1994). The implications for different types of help in listening comprehension with the assistance of a personal computer. In ON-CALL. The Australian Journal of Computers and Language Education (9, No. 1), Queensland, Australia: University of Queensland.