To link to a another page, you put the page title in double square brackets. So to link to the page "Example", you would type [[Example]]. If the page is on another wiki, you need to use an "interwiki link". For Wikipedia, this means putting "wikipedia:" before the name of the page. So to link to a page about Marcus Agrippa, you would type: [[wikipedia:Marcus Agrippa (character of Rome)|Agrippa]]