Verdi, G. (1957). Un ballo in maschera (A masked ball): Opera in three acts. G. Schirmer.
Lua i Stíl Chicago (17ú heag.)Verdi, Giuseppe. Un Ballo in Maschera (A Masked Ball): Opera in Three Acts. New York: G. Schirmer, 1957.
Lua MLA (9ú heag.)Verdi, Giuseppe. Un Ballo in Maschera (A Masked Ball): Opera in Three Acts. G. Schirmer, 1957.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.