Reference resources are usually encyclopedias, dictionaries, handbooks, manuals and other books that you would refer to when wanting to know a definition of a word or concept, a general overview of a topic, specific information about a certain period of time or event in history.
Using Wikipedia can be a great place to start your research. You can learn about a topic, much like you can in Credo Reference, but you can also find links to other sources. Never cite Wikipedia, but use it as a jumping off point for your research.
For example, look up History of Video Games
There is a List on the left hand side that is a Table of Contents - If you click on References, you will see a list of references and many link out to the original article. Some will not and some are actual print books. Another tip is to actually take the title of an article and try copying into one of our databases to see if we have the full-text of the article.
There are also external links included underneath the Reference List. Use those as jumping off points as well.
Remember you cannot cite Wikipedia, and much of this information is also available in other sources. But using the list of references is a great place to start your research.