Pettinger, A. The Republic in danger. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Pettinger, Andrew. The Republic in Danger. Oxford University Press.
Lua MLA (8ú heag.)Pettinger, Andrew. The Republic in Danger. Oxford University Press.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.