Dotan Cohen. What is Ubuntu? 2007-11-24 Available at: http://what-is-what.com/what_is/ubuntu.html Accessed: 2013-5-25
What is Ubuntu? (2007-11-24) In website What-is-What. Retrieved 2013-5-25 from http://what-is-what.com/what_is/ubuntu.html
Dotan Cohen, "What is Ubuntu?" What-is-What http://what-is-what.com/what_is/ubuntu.html (accessed 2013-5-25)
Dotan Cohen. What is Ubuntu? [Internet]. What-is-What; 2007-11-24 [cited 2013-5-25]. Available from: http://what-is-what.com/what_is/ubuntu.html
Dotan Cohen, 'What is Ubuntu?', What-is-What, 2007-11-24, <http://what-is-what.com/what_is/ubuntu.html> [accessed 2013-5-25]
Dotan Cohen. "What is Ubuntu?" What-is-What, 2007-11-24. Web. 2013-5-25.
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