APA (7th ed.) Citation

Riding, A., & Dunton-Downer, L. (2008). Opera (1a. ed.). El Ateneo.

Chicago Style (17th ed.) Citation

Riding, Alan, and Leslie Dunton-Downer. Opera. 1a. ed. Buenos Aires: El Ateneo, 2008.

MLA (9th ed.) Citation

Riding, Alan, and Leslie Dunton-Downer. Opera. 1a. ed. El Ateneo, 2008.