Question

When sending a resume to an employer that doesn't ask for references, is it better to have references upon request on your resume, or to not add anything at all?

Answer 1

If the potential employer doesn't ask for references, then don't list any.

You can put "References upon Request" at the bottom of your resume, but if it makes the resume go on to a second page, then skip it.

It's probably a good idea to have a page made up that contains references (names and contact information), but send it only if asked, or better yet, take it with you if you're asked for an interview.

http://owl.english.purdue.edu/owl/section/6/
Here is a very good website all about job-search writing, including resumes.