Google Scholar has a "cited by" built into the results of any search. When you look at an article in the results section you will find "cited by" below the abstract (if there are any articles or books that have cited the article in question.)
It is important to note that Google Scholar's "cited by" feature is not considered comprehensive. It should be used in conjunction with one of the other databases identified in this guide.
Here are the cited references, using EBSCO's America: History & Life: