Finding Reference Sources in the Catalog
You can search the library catalog for both the type of reference source you are looking for, and the subject you are researching. For example, using the Advanced Search in the library catalog, you could enter "economics" as a keyword on the first row and "encyclopedia" as a subject on the second row.
On the left hand side of the screen, select "Print Book" and/or "eBook" as your format type, depending on what you're looking for. You may also want to filter by year if you want the most recent works.
You can also check the following pages of this guide to see if there is a book listed that may have the info you're looking for!