APA (7th ed.) Citation

Verdi, G., & Cammarano, S. (1907). Der Troubadour: Oper in 4 Akten. Neumann.

Chicago Style (17th ed.) Citation

Verdi, Giuseppe, and Salvatore Cammarano. Der Troubadour: Oper in 4 Akten. Frankfurt a. M: Neumann, 1907.

MLA (9th ed.) Citation

Verdi, Giuseppe, and Salvatore Cammarano. Der Troubadour: Oper in 4 Akten. Neumann, 1907.