Patterson, T. E. (1997). The American democracy (3rd ed., election ed.). McGraw-Hill.
Lua i Stíl Chicago (17ú heag.)Patterson, Thomas E. The American Democracy. 3rd ed., election ed. New York: McGraw-Hill, 1997.
Lua MLA (8ú heag.)Patterson, Thomas E. The American Democracy. 3rd ed., election ed. McGraw-Hill, 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.