References. It is assumed that you have references if you have previous employment history. It is not at all necessary to include “references available upon request”, adding this is actually a potential deterrent. Potential employers will ask you for your references later on in the interview process if they see fit. Of course, if references are asked for within the application process, provide them - just not on your resume.
What is a resume, and why do you need one when you are job searching? A resume is a written compilation of your education, work experience, credentials, and accomplishments. Most professional positions require applicants to submit a resume and cover letter as part of the application process.