Cita APA (7th ed.)

Campbell C. Colin, Gude K. Kathy, & Duckworth M. Michael. (2006). Matrix. Pre-Intermediate Teacher's Book. New York, Oxford University Press, 2006.

Cita Chicago (17th ed.)

Campbell C. Colin, Gude K. Kathy, i Duckworth M. Michael. Matrix. Pre-Intermediate Teacher's Book. New York, Oxford University Press, 2006, 2006.

Cita MLA (9th ed.)

Campbell C. Colin, et al. Matrix. Pre-Intermediate Teacher's Book. New York, Oxford University Press, 2006, 2006.