Blumenthal, J. C. (1962). English 3200: A programmed course in grammar and usage. Harcourt, Brace & World.
Citazione stile Chigago Style (17a edizione)Blumenthal, Joseph C. English 3200: A Programmed Course in Grammar and Usage. New York: Harcourt, Brace & World, 1962.
Citatione MLA (9a ed.)Blumenthal, Joseph C. English 3200: A Programmed Course in Grammar and Usage. Harcourt, Brace & World, 1962.
Attenzione: Queste citazioni potrebbero non essere precise al 100%.