Pritchard, D. (2010). What is this thing called knowledge? (2. ed.). Routledge.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रPritchard, Duncan. What Is This Thing Called Knowledge? 2. ed. London [u.a.]: Routledge, 2010.
एमएलए (8वां संस्करण) प्रशस्ति पत्रPritchard, Duncan. What Is This Thing Called Knowledge? 2. ed. Routledge, 2010.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.