Pritchard, D. (2010). What is this thing called knowledge? (2. ed.). Routledge.
Lua i Stíl Chicago (17ú heag.)Pritchard, Duncan. What Is This Thing Called Knowledge? 2. ed. London [u.a.]: Routledge, 2010.
Lua MLA (8ú heag.)Pritchard, Duncan. What Is This Thing Called Knowledge? 2. ed. Routledge, 2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.