Cita APA (7th ed.)

Doff, A., & Jones, C. (2000). Languaje in use. Cambridge University Press.

Cita Chicago (17th ed.)

Doff, Adrian, i Christopher Jones. Languaje in Use. United Kingdon: Cambridge University Press, 2000.

Cita MLA (9th ed.)

Doff, Adrian, i Christopher Jones. Languaje in Use. Cambridge University Press, 2000.