Hofstadter, R. (1992). Social darwinism in American thought. Beacon.
Cita Chicago Style (17a ed.)Hofstadter, Richard. Social Darwinism in American Thought. Boston: Beacon, 1992.
Cita MLA (9a ed.)Hofstadter, Richard. Social Darwinism in American Thought. Beacon, 1992.
Precaución: Estas citas no son 100% exactas.