Social Darwinism in American thought / Richard Hofstadter ; with a new introd. by Eric Foner. - Boston : Beacon press, [c.1992]. - xxviii, 248 p. ; 20 cm.см.. - (A Beacon press b. : History). - ბიბლიოგრ.: გვ. 205-216. - ISBN 0-8070-5503-4[MFN: 37863]