Massachusetts. June 1, 2010閲覧。 ^ “Members of the 111th Congress”. UnitedStatesSenate. October 18, 2009閲覧。 ^ “Massachusetts Congressional Districts” (PDF)
Electoral College. National Archives. March 18, 2006閲覧。 Senate Manual, 107th Congress. UnitedStates Government Printing Office. (2001). pp. 1131. http://frwebgate
Washington Post, June 19, 2005 The UnitedStatesSenate designates Robert Byrd as President Pro Tempore Emeritus of the UnitedStatesSenate at Congress.gov