Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.