Levis, E. C. (1923). Citizenship: A practical textbook in community civics. Harcourt, Brace and company.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLevis, Ella Cannon. Citizenship: A Practical Textbook in Community Civics. New York: Harcourt, Brace and company, 1923.
एमएलए (8वां संस्करण) प्रशस्ति पत्रLevis, Ella Cannon. Citizenship: A Practical Textbook in Community Civics. Harcourt, Brace and company, 1923.
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