Cita APA

Doff, A., & Jones, C. (1997). Language in use: Upper-intermediate : teacher's book. Cambridge: Cambridge U. P..

Citación estilo Chicago

Doff, Adrian, y Christopher Jones. Language in Use: Upper-intermediate : Teacher's Book. Cambridge: Cambridge U. P., 1997.

Cita MLA

Doff, Adrian, y Christopher Jones. Language in Use: Upper-intermediate : Teacher's Book. Cambridge: Cambridge U. P., 1997.