Παραπομπή σε μορφή APA (7η εκδ.)

Doff, A., & Jones, C. (1997). Language in use: Upper-intermediate : self-study workbook with answer key (1st print.). Cambridge University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Doff, Adrian, και Christopher Jones. Language in Use: Upper-intermediate : Self-study Workbook with Answer Key. 1st print. Cambridge: Cambridge University Press, 1997.

Παραπομπή σε μορφή MLA (8th εκδ.)

Doff, Adrian, και Christopher Jones. Language in Use: Upper-intermediate : Self-study Workbook with Answer Key. 1st print. Cambridge University Press, 1997.