How to indicate the source for your articles on your own site?

Question

Search Engine Optimization

There is a small news site, sometimes we have unique articles and they are copied by top news sites.
When copying, at the beginning they indicate a link to our site, but at the end they write "Source: ***.", where *** is a link and the name of themselves, but not us. In the search for the title of the article, they come out first, and we are in 2-3 place. If the site is top, they will always be the first, even if they copy someone else's article? Thank you.