APA (7th ed.) Citation

Gude, K., & Duckworth, M. (2002). Matrix: Pre-intermediate student's book. Oxford University Press.

Chicago Style (17th ed.) Citation

Gude, Kathy, and Michael Duckworth. Matrix: Pre-intermediate Student's Book. Oxford: Oxford University Press, 2002.

MLA (9th ed.) Citation

Gude, Kathy, and Michael Duckworth. Matrix: Pre-intermediate Student's Book. Oxford University Press, 2002.