APA (7th ed.) Citation

Verdi, G. (1859). Der Troubadour: Oper in 4 Acten ([Stimmen].).

Chicago Style (17th ed.) Citation

Verdi, Giuseppe. Der Troubadour: Oper in 4 Acten. [Stimmen]. [S.l.], 1859.

MLA (9th ed.) Citation

Verdi, Giuseppe. Der Troubadour: Oper in 4 Acten. [Stimmen]. 1859.

Warning: These citations may not always be 100% accurate.