APA aipamena

Ewen, D. (1955). Encyclopedia of the opera. A.A. Wyn.

Chicago Style aipamena

Ewen, David. Encyclopedia of the Opera. New York: A.A. Wyn, 1955.

MLA aipamena

Ewen, David. Encyclopedia of the Opera. A.A. Wyn, 1955.

Kontuz: berrikusi erreferentzia hauek erabili aurretik.