Gower, R. (2006). Grammar in practice 6 (First edition.). Cambridge University Press.
Čikaški stil citiranja (17. izdanje)Gower, Roger. Grammar in Practice 6. First edition. Cambridge: Cambridge University Press, 2006.
MLA način citiranja (9. izdanje)Gower, Roger. Grammar in Practice 6. First edition. Cambridge University Press, 2006.
Upozorenje: Ovi citati možda nisu uvijek 100% točni.