Berry, C. (1991). Voice and the actor (1st Collier Books ed.). Collier Books.
Citazione stile Chigago Style (17a edizione)Berry, Cicely. Voice and the Actor. 1st Collier Books ed. New York: Collier Books, 1991.
Citatione MLA (9a ed.)Berry, Cicely. Voice and the Actor. 1st Collier Books ed. Collier Books, 1991.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.