APA aipamena

Jones, L. (1993). Progress to Proficiency: Student's Book (New edition.). Cambridge: Cambridge University Press.

Chicago Style aipamena

Jones, Leo. Progress to Proficiency: Student's Book. New edition. Cambridge: Cambridge University Press, 1993.

MLA aipamena

Jones, Leo. Progress to Proficiency: Student's Book. New edition. Cambridge: Cambridge University Press, 1993.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.