There is a simple way to include references in your articles. This works the same way in Wikipedia. Add the reference right at the spot in the text you wish to reference it.
You do that just like this<ref>This is the text of the reference. [http://www.agilegeoscience.com/ It can contain links.]</ref>.
Then at the end of the article, add a section called References (at the two-equal-signs level), and a simple tag. This will gather the references in a list.
==References== <references />
- This is the text of the reference. It can contain links.