Cita APA (7a ed.)

Oxenden, C., & Seligson, P. (1996). English file 1. Oxford University Press.

Cita Chicago Style (17a ed.)

Oxenden, Clive, y Paul Seligson. English File 1. Oxford: Oxford University Press, 1996.

Cita MLA (9a ed.)

Oxenden, Clive, y Paul Seligson. English File 1. Oxford University Press, 1996.