Blackwell, C; Neff, D (2015). "Certification and education as determinants of nurse practitioner scope of practice: An investigation of the rules and regulations defining NP scope of practice in the United States". Journal of the American Association of Nurse Practitioners. 27 (10): 552–557. doi:10.1002/2327-6924.12261.
McLaughlin, R; Kleinpell, R (2007). "Preparation for negotiating scope of practice for acute care nurse practitioners". Journal of the American Academy of Nurse Practitioners. 19 (12): 627–634. doi:10.1111/j.1745-7599.2007.00271.x.