Original tekst: Verdi Operas. Tremin gl'insani. The Complete Vocal Scores. Version 2.0. Giuseppe Verdi. Voice sheet music. Verdi Operas. Version 2.0.
Oversættelse: Verdi Operaer. Complete Vocal Scores. Voice noder. Verdi Operaer. Complete Vocal Scores. 2 cd-rom'er.
