- American Staffing Associationwww.americanstaffing.net
- International Council of Nurseswww.icn.ch
- National Institutes of Healthwww.nih.gov
- U.S. Department of Laborwww.dol.gov
- U.S. Bureau of Labor Statisticswww.bls.gov
- U.S. Department of Health & Human Serviceswww.hhs.gov
