Levis, E. C. (1930). Better citizenship: A textbook in community civics. Harcourt, Brace and Company.
Lua i Stíl Chicago (17ú heag.)Levis, Ella Cannon. Better Citizenship: A Textbook in Community Civics. New York, Chicago: Harcourt, Brace and Company, 1930.
Lua MLA (8ú heag.)Levis, Ella Cannon. Better Citizenship: A Textbook in Community Civics. Harcourt, Brace and Company, 1930.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.