APA aipamena

May, P. (2002). Towards proficiency. Oxford: Oxford University Press.

Chicago Style aipamena

May, Peter. Towards Proficiency. Oxford: Oxford University Press, 2002.

MLA aipamena

May, Peter. Towards Proficiency. Oxford: Oxford University Press, 2002.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.