APA aipamena

Marc Helgesen. (1998). Travel File (Teacher's manual). London: Longman.

Chicago Style aipamena

Marc Helgesen. Travel File (Teacher's Manual). London: Longman, 1998.

MLA aipamena

Marc Helgesen. Travel File (Teacher's Manual). London: Longman, 1998.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.