APA (7e ed.) Bronvermelding

Doff, A., & Jones, C. (1997). Language in use: Upper-intermediate : classroom book (6th print.). Cambridge University Press.

Chicago (17e ed.) Bronvermelding

Doff, Adrian, en Christopher Jones. Language in Use: Upper-intermediate : Classroom Book. 6th print. Cambridge: Cambridge University Press, 1997.

MLA (8e ed.) Bronvermelding

Doff, Adrian, en Christopher Jones. Language in Use: Upper-intermediate : Classroom Book. 6th print. Cambridge University Press, 1997.