Oorspronklik: Verdi Operas. Tremin gl'insani. The Complete Vocal Scores. Version 2.0. Giuseppe Verdi. Voice sheet music. Verdi Operas. Version 2.0.
Vertaling: Verdi operas. Die Volledige Vocal tellings. Weergawe 2.0. Voice bladmusiek. Verdi operas. Die Volledige Vocal tellings. Weergawe 2.0.
