All pages should have references to either web sites or books that the information came from. The Reference Policy which was started on 3/10/2011 is that content used in part or in reference to is to be referenced. This policy was started to avoid conflict among editor on what is and is not true (or is Speculation).
For names and objects, sometimes a reference in cartoon is needed:
<ref>[[ThunderCats (original series)|ThunderCats (OS)]] : [[The Unholy Alliance]] (While unpacking supplies from ship, the Claw is given to Lion-O by Tygra)</ref>
For a Website Reference it only needs the url, name of the page and place it is from.
<ref>[http://en.wikipedia.org/wiki/Ghostbusters Ghostbusters (film) from Wikipedia]</ref>
As for any form of print (paper), it is required the page number and book name. However, the more details the better.
<ref>Mueller, Richard (August 1985). ''Ghostbusters: The Supernatural Spectacular'', p. 188. Tor Books, New York NY USA, ISBN 0812585984.</ref>
All Articles should also have this at the bottom so references can be seen.
How will the example look at the bottom of the article: