Cita APA (7a ed.)

Barton, R., & Dal Vera, R. (2011). Voice: Onstage and off (2nd ed.). Routled.

Cita Chicago Style (17a ed.)

Barton, Robert, y Rocco Dal Vera. Voice: Onstage and off. 2nd ed. London: Routled, 2011.

Cita MLA (9a ed.)

Barton, Robert, y Rocco Dal Vera. Voice: Onstage and off. 2nd ed. Routled, 2011.