1. “Nursing's next advance: An internal [international] classification for nursing practice,”;Clark;International Nursing Review,July/August 1992
2. M Gordon “Nursing nomenclature and classification system development,” Online Journal of Issues in Nursing Sept 30, 1998 http://www.nursing world.org/ojin/tpc7/tpc7_l.htm
3. Ibid
4. Ibid