APA-viite (7. p.)

Ewen, D. (1971). The new encyclopedia of the opera. Hill and Wang.

Chicago-viite (17. p.)

Ewen, David. The New Encyclopedia of the Opera. New York: Hill and Wang, 1971.

MLA-viite (9. p.)

Ewen, David. The New Encyclopedia of the Opera. Hill and Wang, 1971.