APA (7th ed.) Citation

Massenet, J., Blau, E., Milliet, P., Hartmann, G., Procter-Gregg, H., & Goethe, J. W. v. (1971). Werther: An opera in four acts (after Goethe). International Music.

Chicago Style (17th ed.) Citation

Massenet, Jules, Edouard Blau, Paul Milliet, Georges Hartmann, Humphrey Procter-Gregg, and Johann Wolfgang von Goethe. Werther: An Opera in Four Acts (after Goethe). New York: International Music, 1971.

MLA (9th ed.) Citation

Massenet, Jules, et al. Werther: An Opera in Four Acts (after Goethe). International Music, 1971.