APA (7th ed.) Zitazioa
Letts, T. (2010). Superior donuts. Theatre Communications Group.
Chicago Style (17th ed.) Zitazioa
Letts, Tracy. Superior Donuts. New York: Theatre Communications Group, 2010.
MLA (9th ed.) Zitazioa
Letts, Tracy. Superior Donuts. Theatre Communications Group, 2010.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.