APA (7th ed.) Zitazioa
Wallace, M. E., & Wallace, R. (1979). Opera scenes for class and stage. Southern Illinois University Press.
Chicago Style (17th ed.) Zitazioa
Wallace, Mary Elaine, eta Robert Wallace. Opera Scenes for Class and Stage. Carbondale: Southern Illinois University Press, 1979.
MLA (9th ed.) Zitazioa
Wallace, Mary Elaine, eta Robert Wallace. Opera Scenes for Class and Stage. Southern Illinois University Press, 1979.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.