Library Association, Walford, A. J., Mullay, M., & Schlicke, P. (1999). Walford's guide to reference materials. Library Association Pub.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रLibrary Association, A. J. Walford, Marilyn Mullay, और Priscilla Schlicke. Walford's Guide to Reference Materials. London: Library Association Pub, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रLibrary Association, et al. Walford's Guide to Reference Materials. Library Association Pub, 1999.
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