Cohen. A Conflict of Principles. University Press of Kansas.
Lua i Stíl Chicago (17ú heag.)Cohen. A Conflict of Principles. University Press of Kansas.
Lua MLA (9ú heag.)Cohen. A Conflict of Principles. University Press of Kansas.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.