APA aipamena

Harrison, M. (1998). Proficiency practice tests. Oxford: Oxford University Press.

Chicago Style aipamena

Harrison, Mark. Proficiency Practice Tests. Oxford: Oxford University Press, 1998.

MLA aipamena

Harrison, Mark. Proficiency Practice Tests. Oxford: Oxford University Press, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.