Levis, E. C. (1923). Citizenship: A practical textbook in community civics. Harcourt, Brace and company.
Lua i Stíl Chicago (17ú heag.)Levis, Ella Cannon. Citizenship: A Practical Textbook in Community Civics. New York: Harcourt, Brace and company, 1923.
Lua MLA (8ú heag.)Levis, Ella Cannon. Citizenship: A Practical Textbook in Community Civics. Harcourt, Brace and company, 1923.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.