Citation chaining (or chasing) is one of my favorite things to do because it helps you visualize the scholarly conversation about your topic. Watch this very brief video from Seattle University Library about using Google Scholar for citation chaining.
You may find books and articles that Drexel University Libraries doesn't have. Good news! We can get it for you. Use EZ Borrow to borrow print books - we'll email you when they are here. Use ILLiad (you'll need to create an account) to get PDFs of articles or books not at Drexel or in EZ Borrow.
Online student? You can still use ILLiad and we will ship books to your home address. However, I recommend checking out what's in print in a library near you. Use WorldCat to search for books and it will show you libraries near you that have a copy.