Buku rujukan Un_ballo_in_maschera

  • Budden, Julian. The Operas of Verdi, vol. 2, New York, Oxford University Press, ISBN 0-19-520068-3.
  • Melitz, Leo. The Opera Goer's Complete Guide, versi 1921.
  • Osborne, Charles. The Complete Operas of Verdi, New York, Da Capo Press, ISBN 0-306-80072-1.

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