APA-referens (7:e uppl.)

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

Chicago-referens (17:e uppl.)

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

MLA-referens (9:e uppl.)

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