Butler, P. (1961). An introduction to library science. University of Chicago Press.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रButler, Pierce. An Introduction to Library Science. Chicago: University of Chicago Press, 1961.
एमएलए (9वां संस्करण) प्रशस्ति पत्रButler, Pierce. An Introduction to Library Science. University of Chicago Press, 1961.
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