Cita APA (7a ed.)

Doff, A., & Jones, C. (1997). Language in use. Upper- Intermediate: Classroom book (5a. ed.). Cambridge University.

Cita Chicago Style (17a ed.)

Doff, Adrian, y Cristopher Jones. Language in Use. Upper- Intermediate: Classroom Book. 5a. ed. Cambridge: Cambridge University, 1997.

Cita MLA (9a ed.)

Doff, Adrian, y Cristopher Jones. Language in Use. Upper- Intermediate: Classroom Book. 5a. ed. Cambridge University, 1997.