Cita APA (7th ed.)

Ewen, D. (1963). Encyclopedia of the opera (New enl. ed.). Hill and Wang.

Cita Chicago (17th ed.)

Ewen, David. Encyclopedia of the Opera. New enl. ed. New York: Hill and Wang, 1963.

Cita MLA (9th ed.)

Ewen, David. Encyclopedia of the Opera. New enl. ed. Hill and Wang, 1963.