Cita APA (7a ed.)

Doff A. Adrian & Jones C. Christopher. (1997). Language in use. Upper-intermediate: Classroom Book. Cambridge, Cambridge University Press, 1997.

Cita Chicago Style (17a ed.)

Doff A. Adrian y Jones C. Christopher. Language in Use. Upper-intermediate: Classroom Book. Cambridge, Cambridge University Press, 1997, 1997.

Cita MLA (9a ed.)

Doff A. Adrian y Jones C. Christopher. Language in Use. Upper-intermediate: Classroom Book. Cambridge, Cambridge University Press, 1997, 1997.