If you have financed a portion of your college expenses through employment, loans, grants, or scholarships, you could mention it in this section. This section should be included only if it adds to your qualifications. For graduate students, and particularly Ph.D. candidates, the personal profile section is usually unnecessary. The personal section would also be an appropriate place to indicate your citizenship or visa status, if you so desire. If you are a U.S. Citizen or Permanent Resident, but have some information which would suggest that you are not a citizen of the U.S., it is to your advantage to specify your citizenship on the resume.
Some resumes even list the names and addresses of each reference on the resume itself.
If you are running out of space, keep in mind that employers will contact you for references if they need the references, even if they do not see a statement suggesting that they do so. In other words, it's okay to leave this section off, if you wish. Usually three or four references are sufficient. They should be chosen on the basis of the individuals' ability to comment on your accomplishments and qualifications rather than attesting to your character and family background. Professors, former employers, campus administrators, coaches, club advisors are examples of people that you may want to ask for reference letters.