References :

Pusak, James P. and Sue K. Otto. (1997). "Taking Control of Multimedia. "Technology-Enhanced Language Learning. Ed. Michael D. Bush. Lincolnwood: National Textbook Company. 1-46.

Radzik, Andy. (1997). The Generative Model for CALL
Development: http://www.geocities.com/CollegePark/Library/8960/