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As a research tool the internet should be approached with caution. It should be a supplement to your academic endeavour and not a replacement for it.
Most people use search engines when looking for information on the web. Google, for example, is very well known - the most widely used and one of the better search engines for coverage and use.
"Google is Not the Answer!" Cartoon © 2004 Michael P. May. Used with permission.
Should you be referencing Wikipedia in your academic assignments?
Wikipedia articles might be used as a starting point for research but your assignment should never be based on information from Wikipedia without first checking other sources. Failure to do this caused considerable embarrassment for the Leveson Enquiry.
Even the people at Wikipedia have concerns about students using Wikipedia for academic research. See what they have to say about it:
Are you stuck in a filter bubble? Watch this thought provoking film from Eli Parisier about the unintended consequences of web companies personalising our web searching.