"The Ninth Amendment in Light of Text and History ", Cato Supreme Court Review 13 (2009–2010). Williams, Ryan. "The Ninth Amendment as a Rule of Construction", Columbia Law Review, Vol. 111, p. 498 (2011). External links "CRS Annotated Constitution: 9th Amendment" by the Congressional Research Service (2000) "Proposed Amendments to the Constitution" by James Madison (1789) "Bill of Rights Institute: Ninth Amendment" 1791 in American law 09 1791 in American politics