1. Definition of evolution. Available at: http://www.merriam-webster.com/dictionary/evolution. Accessed January 19, 2013.
2. Herbert Spencer quotation. Stanford Encyclopedia of Philosophy. Available at: http://plato.stanford.edu/entries/spencer/. Accessed January 19, 2013.
3. Henry Ford quotation. Goodreads. Available at: http://www.goodreads.com/author/show/203714.Henry_Ford. Accessed January 19, 2013.
4. The Evolving Healthcare Paradigm and the Need for Revolutionary Change. Leadership Resource Center. Available at: http://www.ashpfoundation.org/leadershipprimer/Primer8.html. Accessed January 19, 2013.