Secure 3-5 references prior to interviews. References should be people who have supervised you in an academic or hands-on setting like a job, internship, or volunteer positon. Friends, family, and well-known people who do not know you well are not good references. They can say little about your potential for success.
To maintain consistency, use the same header for your reference sheet as you have used on your resume and cover letter.
In many all cases, you will NOT submit references with your resume. Instead, bring them to your interviews to provide upon request.
Inspired in part by: Syracuse University Career Services, Cornell Career Services, UC Berkeley Career Center, and RIT Career Services