To get link from Wikipedia, you should follow the strategy of broken link building.
First, Do a simple search as "site:wikipedia.org [keyword] + dead link†" or else you can use a tool called WikiGrabber that allows you to search for dead links on Wikipedia pages.
Next, visit a page in the search results that's relevant to your site
Hit ctrl + f and search for dead linkâ€
Now, you can re-create that dead resource on your site and place a link in Wikipedia with yours.