Cita APA

Yorkey, R. C. (1977). English for international communication. New York: American Book.

Citación estilo Chicago

Yorkey, Richard C. English for International Communication. New York: American Book, 1977.

Cita MLA

Yorkey, Richard C. English for International Communication. New York: American Book, 1977.

Precaución: Estas citas no son 100% exactas.