APA (7 वां संस्करण) प्रशस्ति पत्र
Green, H., & Powell, S. (2005). Doctoral study in contemporary higher education. Society for Research into Higher Education & Open University Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र
Green, Howard, और Stuart Powell. Doctoral Study in Contemporary Higher Education. Maidenhead: Society for Research into Higher Education & Open University Press, 2005.
एमएलए (9वां संस्करण) प्रशस्ति पत्र
Green, Howard, और Stuart Powell. Doctoral Study in Contemporary Higher Education. Society for Research into Higher Education & Open University Press, 2005.
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