International Society for Knowledge Organization. (2021). Knowledge Organization. Indeks Verlag.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रInternational Society for Knowledge Organization. Knowledge Organization. Frankfurt, Alemanha: Indeks Verlag, 2021.
एमएलए (8वां संस्करण) प्रशस्ति पत्रInternational Society for Knowledge Organization. Knowledge Organization. Indeks Verlag, 2021.
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