APA (7 वां संस्करण) प्रशस्ति पत्र
Kettley, N. C. (2010). Theory building in educational research. Continuum International Pub. Group.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Kettley, Nigel C. Theory Building in Educational Research. New York: Continuum International Pub. Group, 2010.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Kettley, Nigel C. Theory Building in Educational Research. Continuum International Pub. Group, 2010.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.