ZARRI, Gian Piero. Knowledge representation. In: David G. SCHWARTZ, ed. Encyclopedia of knowledge management. Hershey (PA): Idea Group Reference, © 2006, s. 467-477. doi:10.4018/978-1-59140-573-3.ch061. ISBN 1-59140-573-4 (váz.). ISBN 978-1-59140-573-3 (váz.). ISBN 1-59140-574-2 (Online). ISBN 978-1-59140-574-0 (Online).
Dostupné komerčně z (IGI Global): http://www.igi-global.com/chapter/knowledge-representation/16986 nebo http://dx.doi.org/10.4018/978-1-59140-573-3.ch061