Heywood Andrew. (2004). Political Theory (3rd.). Palgrave Mcmillan.
Lua i Stíl Chicago (17ú heag.)Heywood Andrew. Political Theory. 3rd. New York: Palgrave Mcmillan, 2004.
Lua MLA (9ú heag.)Heywood Andrew. Political Theory. 3rd. Palgrave Mcmillan, 2004.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.