Dotan Cohen. What is Spam? 2011-6-10 Available at: http://what-is-what.com/what_is/spam.html Accessed: 2017-3-23
What is Spam? (2011-6-10) In website What-is-What. Retrieved 2017-3-23 from http://what-is-what.com/what_is/spam.html
Dotan Cohen, "What is Spam?" What-is-What http://what-is-what.com/what_is/spam.html (accessed 2017-3-23)
Dotan Cohen. What is Spam? [Internet]. What-is-What; 2011-6-10 [cited 2017-3-23]. Available from: http://what-is-what.com/what_is/spam.html
Dotan Cohen, 'What is Spam?', What-is-What, 2011-6-10, <http://what-is-what.com/what_is/spam.html> [accessed 2017-3-23]
Dotan Cohen. "What is Spam?" What-is-What, 2011-6-10. Web. 2017-3-23.
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