Cita APA

Campbell, C., & Colin Campbell; Kathy Gude; JaMichael Duckworth. (2002). Matrix: Pre-Intermediate (Teacher's book). Oxford: Oxford University Press.

Chicago Style Citation

Campbell, Colin, i Colin Campbell; Kathy Gude; JaMichael Duckworth. Matrix: Pre-Intermediate (Teacher's Book). Oxford: Oxford University Press, 2002.

Cita MLA

Campbell, Colin, i Colin Campbell; Kathy Gude; JaMichael Duckworth. Matrix: Pre-Intermediate (Teacher's Book). Oxford: Oxford University Press, 2002.