Craig, E. (2002). Philosophy: A Very Short Introduction (1st.). Oxford.
Lua i Stíl Chicago (17ú heag.)Craig, Edward. Philosophy: A Very Short Introduction. 1st. Oxford, 2002.
Lua MLA (9ú heag.)Craig, Edward. Philosophy: A Very Short Introduction. 1st. Oxford, 2002.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.