Cita APA (7a ed.)

Hildebrandt, G., & Leroux, G. (1993). Phantom of the Opera. The Unicorn Publishing House.

Cita Chicago Style (17a ed.)

Hildebrandt, Greg, y Gaston Leroux. Phantom of the Opera. New Jersey: The Unicorn Publishing House, 1993.

Cita MLA (9a ed.)

Hildebrandt, Greg, y Gaston Leroux. Phantom of the Opera. The Unicorn Publishing House, 1993.