APA aipamena

Hopkins D. Diana & Cullen P. Pauline. (2007). Cambridge Grammar for IELTS: Grammar reference and practice. Cambridge, Cambridge University Press, 2007.

Chicago Style aipamena

Hopkins D. Diana and Cullen P. Pauline. Cambridge Grammar for IELTS: Grammar Reference and Practice. Cambridge, Cambridge University Press, 2007, 2007.

MLA aipamena

Hopkins D. Diana and Cullen P. Pauline. Cambridge Grammar for IELTS: Grammar Reference and Practice. Cambridge, Cambridge University Press, 2007, 2007.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.