APA aipamena

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

Chicago Style aipamena

Doff, Adrian, và Christopher Jones. Language in Use: Upper-intermediate : Classroom Book. Cambridge: Cambridge U. P., 1997.

MLA aipamena

Doff, Adrian, và Christopher Jones. Language in Use: Upper-intermediate : Classroom Book. Cambridge: Cambridge U. P., 1997.