Hill, H. C. (1928). Community civics. Ginn & Company.
Lua i Stíl Chicago (17ú heag.)Hill, Howard C. Community Civics. Boston: Ginn & Company, 1928.
Lua MLA (8ú heag.)Hill, Howard C. Community Civics. Ginn & Company, 1928.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.