Oryginalny tekst: Verdi Operas. Compared to traditional printed sheet music or music downloads, it is incredibly inexpensive. Version 2.0.
Tłumaczenie: Verdi Opery. Otello, Akt IV - Diceste questa sera le vostre preci. The Complete Vocal Scores. Wersja 2.0. Giuseppe Verdi. Nut głosem.