Sources should be cited for information in articles. You can cite sources by putting

<ref name="refname">Text or {{cite web}} or {{cite journal}}</ref>

after material from that reference. If you use material from the same reference again later in the article, you can simply write

<ref name="refname" />

Replace refname with a short name you want to use to refer to the reference (it won't actually appear anywhere and should not contain spaces). For the body of the reference, you can use:

• Template:Cite web for web sites (please see the template page for usage info)
• Template:Cite journal for articles printed in magazines, etc. (again, please see the template page)
• Just text describing the reference for other sources

Then at the bottom of a page create a references section containing simply Template:Reflist, like this:

==References==
{{reflist}}