APA (7th ed.) Zitazioa
Guy, N. (2015). The magic of Beverly Sills. University of Illinois Press.
Chicago Style (17th ed.) Zitazioa
Guy, Nancy. The Magic of Beverly Sills. Urbana, [Illinois]: University of Illinois Press, 2015.
MLA (9th ed.) Zitazioa
Guy, Nancy. The Magic of Beverly Sills. University of Illinois Press, 2015.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.