Verdi, G. (2004). Verdi's a masked ball. Opera Journeys Publishing.
Lua i Stíl Chicago (17ú heag.)Verdi, Giuseppe. Verdi's a Masked Ball. Coral Gables, FL: Opera Journeys Publishing, 2004.
Lua MLA (9ú heag.)Verdi, Giuseppe. Verdi's a Masked Ball. Opera Journeys Publishing, 2004.
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