5William H. Goetzmann, "Time's American Adventures: American Historians and Their Writings Since 1776", in Sources for American Studies, edited by J. B. Kellogg and R.H. Walker, p. 158.
6乔治.P.古奇.《十九世纪的历史学与历史学家》下册,第646页.
7John Higham, Leonard Krieger and Felix Gilbert, History, Englewood, Prentice- Hall, Inc. , 1965, p. 95.
8Richard Hofstadter, Social Darwinism in American Thought, Boston, seventh printing in 1963, p. 34.
9Oscar Handlin. Truth in History. the BelknaD Press of Harvard University Press, 1979, p.62.
10William H. Goetznaann, "Time's American Adventures: American Historians and Their Writings Since 1776", in Sources for American Studies, edited by J. B. Kellogg and R. H. Walker, p. 158.
