Grayling, A. C. (1998). Philosophy 1: A guide through the subject. Oxford University Press.
Lua i Stíl Chicago (17ú heag.)Grayling, A. C. Philosophy 1: A Guide Through the Subject. Oxford ; New York: Oxford University Press, 1998.
Lua MLA (8ú heag.)Grayling, A. C. Philosophy 1: A Guide Through the Subject. Oxford University Press, 1998.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.