"Turn Your Junk into Rewards!". Small Business Knowledge Center. 4th of October 2018.
"Small Business Knowledge Center". Better Business Bureau, 2016. 4th of October 2018.
"A Justification for Prohibition of Spam 2002". Rice, Cindy M. 10th of October 2018.
"Technical and Legal Approaches to Unsolicited Electronic Mail" Sorkin, David E. 16th of October 2018.
 "Virus Basics". US-Cert. 20th of October 2018.
"The World's Worst Spam Support ISPs". Spamhaus. 20th of October 2018.
"Who is my ISP?" whoismyisp.org. 21st of October 2018.
"What is an Internet Service Provider (ISP)?" Simplify Digital. 19th of October 2018.
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