Encyclopedia of U.S. political history .  Washington, D.C. :  CQ Press,  c2010 .  7 sv.  
Encyclopedia of U.S. political history. Volume one,
Encyclopedia of U.S. political history. Volume two,
Encyclopedia of U.S. political history. Volume three,
Encyclopedia of U.S. political history. Volume four,
Encyclopedia of U.S. political history. Volume five,
Encyclopedia of U.S. political history. Volume six :
Encyclopedia of U.S. political history. Volume seven,