Nooteboom, Bart. "Cognitive Distance in and Between Communities of Practice and Firms: Where Do Exploitation and Exploration Take Place, and How Are They Connected?." Community, Economic Creativity, and Organization. : Oxford University Press, 2008-09-25. Oxford Scholarship Online. 2009-01-01. Date Accessed 23 May. 2013 <http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199545490.001.0001/acprof-9780199545490-chapter-6>.
Nooteboom, B.(2008-09-25). Cognitive Distance in and Between Communities of Practice and Firms: Where Do Exploitation and Exploration Take Place, and How Are They Connected?. In Community, Economic Creativity, and Organization. : Oxford University Press. Retrieved 23 May. 2013, from http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199545490.001.0001/acprof-9780199545490-chapter-6.
Nooteboom, Bart. "Cognitive Distance in and Between Communities of Practice and Firms: Where Do Exploitation and Exploration Take Place, and How Are They Connected?." In Community, Economic Creativity, and Organization. : Oxford University Press, 2008-09-25. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199545490.001.0001/acprof-9780199545490-chapter-6.
Nooteboom B. Cognitive Distance in and Between Communities of Practice and Firms: Where Do Exploitation and Exploration Take Place, and How Are They Connected?. In: Amin A, Roberts J. Community, Economic Creativity, and Organization. Oxford University Press; 2008. http://www.oxfordscholarship.com/view/10.1093/acprof:oso/9780199545490.001.0001/acprof-9780199545490-chapter-6. Accessed May 23, 2013.