Styl cytowania APA

Robert Barton & Rocco Dal Vera. (2011). Voice: Onstage and off (2nd ed.). New York.

Styl cytowania Chicago

Robert Barton i Rocco Dal Vera. Voice: Onstage and off. 2nd ed. Routledge: New York, 2011.

Styl cytowania MLA

Robert Barton i Rocco Dal Vera. Voice: Onstage and off. 2nd ed. New York, 2011.