APA (7th ed.) Citation

Orrey, L., & Chase, G. (1976). The Encyclopedia of opera. Pitman.

Chicago Style (17th ed.) Citation

Orrey, Leslie, and Gilbert Chase. The Encyclopedia of Opera. London: Pitman, 1976.

MLA (9th ed.) Citation

Orrey, Leslie, and Gilbert Chase. The Encyclopedia of Opera. Pitman, 1976.

Warning: These citations may not always be 100% accurate.