APA (7th ed.) Citation

Leopoldi, H., & Haller, H. (1955). Gala-Premiere in der Oper. Metroton Musikverlag.

Chicago Style (17th ed.) Citation

Leopoldi, Hermann, and Hanns Haller. Gala-Premiere in Der Oper. Wien: Metroton Musikverlag, 1955.

MLA (9th ed.) Citation

Leopoldi, Hermann, and Hanns Haller. Gala-Premiere in Der Oper. Metroton Musikverlag, 1955.