Berry, C. (1991). Voice and the actor (1st Collier Books ed.). Collier Books.
Lua i Stíl Chicago (17ú heag.)Berry, Cicely. Voice and the Actor. 1st Collier Books ed. New York: Collier Books, 1991.
Lua MLA (9ú heag.)Berry, Cicely. Voice and the Actor. 1st Collier Books ed. Collier Books, 1991.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.