Cita APA (7a ed.)

Oxenden, C., & Latham Koenig, C. (2002). English file Upper intermediate: Student's book. Oxford University Press.

Cita Chicago Style (17a ed.)

Oxenden, Clive, y Christina Latham Koenig. English File Upper Intermediate: Student's Book. Oxford: Oxford University Press, 2002.

Cita MLA (9a ed.)

Oxenden, Clive, y Christina Latham Koenig. English File Upper Intermediate: Student's Book. Oxford University Press, 2002.