Held, D. (2006). Models of democracy (3rd ed.). Polity.
Lua i Stíl Chicago (17ú heag.)Held, David. Models of Democracy. 3rd ed. Cambridge, UK: Polity, 2006.
Lua MLA (9ú heag.)Held, David. Models of Democracy. 3rd ed. Polity, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.