APA (7th ed.) Citation

Korngold, E. W., Steingruber, I., Friedrich, W., & Majkut, E. La Violanta. The Golden Age of Opera.

Chicago Style (17th ed.) Citation

Korngold, Erich Wolfgang, Ilona Steingruber, Willy Friedrich, and Erich Majkut. La Violanta. [s.l.]: The Golden Age of Opera.

MLA (9th ed.) Citation

Korngold, Erich Wolfgang, et al. La Violanta. The Golden Age of Opera.