Blaich, T. P., & Baumgartner, J. C. (1953). The challenge of democracy. McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Blaich, Theodore Paul, agus Joseph Cornelius Baumgartner. The Challenge of Democracy. New York: McGraw-Hill, 1953.
Lua MLA (9ú heag.)Blaich, Theodore Paul, agus Joseph Cornelius Baumgartner. The Challenge of Democracy. McGraw-Hill, 1953.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.