Blumenthal, J. C. (1973). English 2200: A programmed course in grammar and usage (2nd ed.). Harcourt Brace Jovanovich.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रBlumenthal, Joseph C. English 2200: A Programmed Course in Grammar and Usage. 2nd ed. New York: Harcourt Brace Jovanovich, 1973.
एमएलए (9वां संस्करण) प्रशस्ति पत्रBlumenthal, Joseph C. English 2200: A Programmed Course in Grammar and Usage. 2nd ed. Harcourt Brace Jovanovich, 1973.
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