1. Herophilus. Fragment. 300 bc.
2. Letter to Thomas Mann Randolph, Jr., July 6, 1787;Jefferson,1955
3. Disraeli, Benjamin, Earl of Beaconsfield: Speech, Battersea Park, June 23, 1877. London Times, June 25, 1877:10.
4. Association of American Physicians and Surgeons, Inc. July 31, 1965 Reaffirming action adopted by the board of directors. Non-participation program of AAPS. Available at: http://www.aapsonline.org/brochures/princip.htm. Accessed July 7, 2005.
5. The genesis and development of Medicare;Hamowy,2001