- American Staffing Associationwww.americanstaffing.net
- American Public Health Associationwww.apha.org
- American Society for Pain Management Nursingwww.aspmn.org
- American Health Care Associationwww.ahcancal.org
- National Institutes of Healthwww.nih.gov
- U.S. Department of Laborwww.dol.gov
