APA (7th ed.) Zitazioa

Gower, R. (2006). Grammar in practice 6 (First edition.). Cambridge University Press.

Chicago Style (17th ed.) Zitazioa

Gower, Roger. Grammar in Practice 6. First edition. Cambridge: Cambridge University Press, 2006.

MLA (9th ed.) Zitazioa

Gower, Roger. Grammar in Practice 6. First edition. Cambridge University Press, 2006.