APA

Riding A., Dunton-Downer L., . (2006). Opera. New York: DK Pub.

Chicago

Riding Alan, Dunton-Downer Leslie, . 2006. Opera. New York: DK Pub.

Harvard

Riding A., Dunton-Downer L., . (2006). Opera. New York: DK Pub.

MLA

Riding Alan, Dunton-Downer Leslie, . Opera. New York: DK Pub. 2006.