APA-viite

Doff, A. J. (2001). Language in use: Self-study workbook with answer key. Cambridge University Press.

Chicago-tyylinen lähdeviittaus

Doff, Adrian; Jones. Language in Use: Self-study Workbook with Answer Key. Cambridge: Cambridge University Press, 2001.

MLA-viite

Doff, Adrian; Jones. Language in Use: Self-study Workbook with Answer Key. Cambridge University Press, 2001.