APA aipamena

Graver, B. (1999). Advanced English practice (third edition.). New york: Cambridge University Press.

Chicago Style aipamena

Graver, B.D. Advanced English Practice. third edition. New york: Cambridge University Press, 1999.

MLA aipamena

Graver, B.D. Advanced English Practice. third edition. New york: Cambridge University Press, 1999.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.