1. American Academy of Physician Assistants (AAPA) 2016 What Is a PA? https://www.aapa.org/What-is-a-PA/
2. American Association of Nurse Practitioners (AANP) 2013 Nurse Practitioner Cost-Effectiveness https://www.aanp.org/aanpqa2/images/documents/publications/costeffectiveness.pdf
3. American Association of Nurse Practitioners (AANP) 2015a NP Infographic: Nurse Practitioners https://www.aanp.org/all-about-nps/what-is-an-np-2
4. American Association of Nurse Practitioners (AANP) 2015b NP Fact Sheet https://www.aanp.org/all-about-nps/np-fact-sheet
5. American Association of Nurse Practitioners (AANP) 2016 State Practice Environment https://www.aanp.org/legislation-regulation/state-legislation/state-practice-environment