APA aipamena

Black, M. (2006). Objective IELTS Student's Book. Intermediate. Cambridge University Press.

Chicago Style aipamena

Black, Michael. Objective IELTS Student's Book. Intermediate. Cambridge University Press, 2006.

MLA aipamena

Black, Michael. Objective IELTS Student's Book. Intermediate. Cambridge University Press, 2006.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.