Horton, J. (2010). Political Obligation (2nd.). Palgrave Macmillan.
Lua i Stíl Chicago (17ú heag.)Horton, John. Political Obligation. 2nd. New York: Palgrave Macmillan, 2010.
Lua MLA (9ú heag.)Horton, John. Political Obligation. 2nd. Palgrave Macmillan, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.