Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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