(1975). The universe of information: The work of Paul Otlet for documentation and international organisation / by W. Boyd Rayward.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रThe Universe of Information: The Work of Paul Otlet for Documentation and International Organisation / by W. Boyd Rayward. 1975.
एमएलए (9वां संस्करण) प्रशस्ति पत्रThe Universe of Information: The Work of Paul Otlet for Documentation and International Organisation / by W. Boyd Rayward. 1975.
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