Cita APA (7th ed.)

Mordden, E. (1987). A guide to opera recordings. Oxford University Press.

Cita Chicago (17th ed.)

Mordden, Ethan. A Guide to Opera Recordings. New York: Oxford University Press, 1987.

Cita MLA (9th ed.)

Mordden, Ethan. A Guide to Opera Recordings. Oxford University Press, 1987.