APA (7th ed.) Citation

Bourne, J., & Kennedy, M. (1998). Who's who in opera: A guide to opera characters. Oxford University Press.

Chicago Style (17th ed.) Citation

Bourne, Joyce, and Michael Kennedy. Who's Who in Opera: A Guide to Opera Characters. Oxford: Oxford University Press, 1998.

MLA (9th ed.) Citation

Bourne, Joyce, and Michael Kennedy. Who's Who in Opera: A Guide to Opera Characters. Oxford University Press, 1998.