1. Scope and standards of advanced practice registered nursing;American Nurses Association,1996
2. American Association of Colleges of Nursing. AACN position statement on the practice doctorate in nursing. October, 2004.
3. AORN position statement: perioperative advanced practice nurse;Association of Perioperative Registered Nurses,2007
4. The role of a nurse practitioner in an ambulatory surgery unit;Guido;AORN J,2004
5. Institute for Healthcare Improvement. Surgical Care Improvement Project. 2007.