Cassell, K. A., & Hiremath, U. (2006). Reference and information services in the 21st century: An introduction. Facet.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रCassell, Kay Ann, और Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. London: Facet, 2006.
एमएलए (9वां संस्करण) प्रशस्ति पत्रCassell, Kay Ann, और Uma Hiremath. Reference and Information Services in the 21st Century: An Introduction. Facet, 2006.
चेतावनी: ये उद्धरण हमेशा 100% सटीक नहीं हो सकते हैं.