Cita APA (7a ed.)

Barton, R., & Dal Vera, R. (2017). Voice: Onstage and off (Third edition.). Routledge.

Cita Chicago Style (17a ed.)

Barton, Robert, y Rocco Dal Vera. Voice: Onstage and off. Third edition. New York, NY: Routledge, 2017.

Cita MLA (9a ed.)

Barton, Robert, y Rocco Dal Vera. Voice: Onstage and off. Third edition. Routledge, 2017.