West, R., & Ansberry, M. (1957). The rehabilitation of speech (3rd ed.). Harper & Brothers.
Citazione stile Chigago Style (17a edizione)West, Robert, e Merle Ansberry. The Rehabilitation of Speech. 3rd ed. New York: Harper & Brothers, 1957.
Citatione MLA (9a ed.)West, Robert, e Merle Ansberry. The Rehabilitation of Speech. 3rd ed. Harper & Brothers, 1957.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.