APA (7th ed.) Citation

Cammarano, S., Verdi, G., & Mendel, H. (1880). Der Troubadour (Il Trovatore): Oper in vier Akten. S. Mode's Verlag (Gustav Mode).

Chicago Style (17th ed.) Citation

Cammarano, Salvadore, Giuseppe Verdi, and Hermann Mendel. Der Troubadour (Il Trovatore): Oper in Vier Akten. Berlin: S. Mode's Verlag (Gustav Mode), 1880.

MLA (9th ed.) Citation

Cammarano, Salvadore, et al. Der Troubadour (Il Trovatore): Oper in Vier Akten. S. Mode's Verlag (Gustav Mode), 1880.