APA (7th ed.) Citation

Langridge, P., & Sadie, S. (2004). The illustrated encyclopedia of opera. Flame Tree Publishing.

Chicago Style (17th ed.) Citation

Langridge, Philip, and Stanley Sadie. The Illustrated Encyclopedia of Opera. London: Flame Tree Publishing, 2004.

MLA (9th ed.) Citation

Langridge, Philip, and Stanley Sadie. The Illustrated Encyclopedia of Opera. Flame Tree Publishing, 2004.