Heywood Andrew. (2017). Politics (4.). Palgrave.
Lua i Stíl Chicago (17ú heag.)Heywood Andrew. Politics. 4. Palgrave, 2017.
Lua MLA (9ú heag.)Heywood Andrew. Politics. 4. Palgrave, 2017.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.