Forum:Wikia Interlinking

Hello, I am creating a sort-of GTA fanon site to create my own characters, but would also like to tie in with characters from canon, specifically character and organization pages on this site. How would I go about creating a template that would be able to do this. For example the SW Fanon wiki and it's easy to use template that links to Wookiepedia. Thanks very much in advance, any help would be appreciated