Blumenthal, J. C. (1962). English 3200: A programed course in grammar and usage. New York: Harcourt, Brace & World.
Citación estilo ChicagoBlumenthal, Joseph C. English 3200: A Programed Course in Grammar and Usage. New York: Harcourt, Brace & World, 1962.
Cita MLABlumenthal, Joseph C. English 3200: A Programed Course in Grammar and Usage. New York: Harcourt, Brace & World, 1962.
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