Andrews, Edmund L.; Leonhardt, David; Porter, Eduardo; Uchitelle, Louis (October 26, 2005), „At the Fed, an Unknown Became a Safe Choice“, The New York Times. Retrieved January 31, 2010
Andrews, Edmund L.; David Leonhardt; Porter, Eduardo; Louis Uchitelle (October 26, 2005), „At the Fed, an Unknown Became a Safe Choice“, The New York Times. Retrieved January 31, 2010