Greetham, B. (2006). Philosophy. Palgrave Macmillan.
Lua i Stíl Chicago (17ú heag.)Greetham, Bryan. Philosophy. Basingstoke [England] ; New York: Palgrave Macmillan, 2006.
Lua MLA (8ú heag.)Greetham, Bryan. Philosophy. Palgrave Macmillan, 2006.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.