APA (7th ed.) Citation

Crookes, G., & Gass, S. M. (1993). Tasks and language learning: Integrating theory and practice. Multilingual Matters.

Chicago Style (17th ed.) Citation

Crookes, Graham, and Susan M. Gass. Tasks and Language Learning: Integrating Theory and Practice. Clevedon [England] ; Philadelphia: Multilingual Matters, 1993.

MLA (9th ed.) Citation

Crookes, Graham, and Susan M. Gass. Tasks and Language Learning: Integrating Theory and Practice. Multilingual Matters, 1993.