APA (7th ed.) Citation

Gluck, C. W. (1959). Orpheus and Euridice. Opera in four acts. G. Schirmer.

Chicago Style (17th ed.) Citation

Gluck, Christoph Willibald. Orpheus and Euridice. Opera in Four Acts. New York: G. Schirmer, 1959.

MLA (9th ed.) Citation

Gluck, Christoph Willibald. Orpheus and Euridice. Opera in Four Acts. G. Schirmer, 1959.