Citations
In accordance with Wikipedia policy, facts and assertions should be attributed to verifiable, reliable sources wherever possible (see WP:V and WP:RS).
The Project's preferred method for this is inline citations using the <ref> tag.
Usage is very simple. Examples:
Citing a book:
<ref>Author, Book, ISBN, page number</ref>[1]
Citing a book multiple times:
Dough, Joe, "Katy Perry Book", ISBN 73737373 (2000), Hamyln, London
<ref>Joedough, p23</ref>[2]
Reusing a reference:
<ref name="somewebsite">[http://www.web.com/ Some Website]</ref>[3] Second use<ref name="somewebsite"/>[3]
References
The citations are displayed by placing a <references/> tag at the bottom of the article.