APA (7th ed.) Zitazioa
Longenbach, J. (2007). Draft of a letter. University of Chicago Press.
Chicago Style (17th ed.) Zitazioa
Longenbach, James. Draft of a Letter. Chicago: University of Chicago Press, 2007.
MLA (9th ed.) Zitazioa
Longenbach, James. Draft of a Letter. University of Chicago Press, 2007.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.