Please sign your name on talk pages, by using four tildes (~~~~). This will automatically produce your username and the date, and helps to identify who said what and when. Please do not sign any edit that is not on a talk page.
Some pages that have been vandalized repeatedly are semi-protected, meaning that editing by new or unregistered users is prohibited through technical measures. If you have an account that is four days old and has made at least 10 edits, then you can bypass semi-protection and edit any semi-protected page. Some pages, such as highly visible templates, are fully-protected, meaning that only administrators can edit them.
Do a search on Google or your preferred search engine for the subject of the Wikipedia article that you want to create a citation for.
Find a website that supports the claim you are trying to find a citation for.
In a new tab/window, go to the citation generator, click on the 'An arbitrary website' bubble, and fill out as many fields as you can about the website you just found.
Click the 'Get reference wiki text' button.
Highlight, and then copy (Ctrl+C or Apple+C), the resulting text (it will be something like <ref> {{cite web | .... }}</ref>, copy the whole thing).
In the Wikipedia article, after the claim you found a citation for, paste (Ctrl+V or Apple+V) the text you copied.
If the article does not have a References or Notes section (or the like), add this to the bottom of the page, but above the External Links section and the categories:
==References==
{{Reflist}}
What is a WikiProject, and how do I join one?
A WikiProject is a group of editors that are interested in improving the coverage of certain topics on Wikipedia. (See this page for a complete list of WikiProjects.) If you would like to help, add your username to the list that is on the bottom of the WikiProject page.