SpringerLink (Online service), Albert, D., Doble, C., Eppstein, D., Hu, X., & Falmagne, J. (2013). Knowledge spaces: Applications in education. Springer Berlin Heidelberg.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रSpringerLink (Online service), Dietrich Albert, Christopher Doble, David Eppstein, Xiangen Hu, और Jean-Claude Falmagne. Knowledge Spaces: Applications in Education. Berlin, Heidelberg: Springer Berlin Heidelberg, 2013.
एमएलए (8वां संस्करण) प्रशस्ति पत्रSpringerLink (Online service), et al. Knowledge Spaces: Applications in Education. Springer Berlin Heidelberg, 2013.
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