When searching for primary sources in databases - articles written by the theorist you've selected:
If your theorist's primary source is a book, and we don't have it in the EKU Libraries's collection, you may request it for free from Library Express/Interlibrary Loan. Here's how: https://youtu.be/NVI91O55KdA
Please be sure to request this well in advance to allow for mailing time. It may take two weeks or more.
Sources which may not be used include: