1. The American Heritage Dictionary of the English Language. (2006a). Care [Electronic Version]. Retrieved May 15, 2007, from http://dictionary.reference.com/browse/care
2. The American Heritage Dictionary of the English Language. (2006b). Nurse [Electronic Version]. Retrieved May 15, 2007, from http://dictionary.reference.com/browse/nurse
3. The American Heritage Stedman's Medical Dictionary. (n.d.). Nurse [Electronic Version]. Retrieved May 15, 2007, from http://dictionary.reference.com/browse/nurse
4. Nursing care makes a difference. Application of the Omaha System;Barrera;Outcomes Management,2003