Cita APA (7a ed.)

Hofstadter, R. (1971). Social Darwinism in American Trought (Rev. ed.). Beacon Press.

Cita Chicago Style (17a ed.)

Hofstadter, Richard. Social Darwinism in American Trought. Rev. ed. Boston: Beacon Press, 1971.

Cita MLA (9a ed.)

Hofstadter, Richard. Social Darwinism in American Trought. Rev. ed. Beacon Press, 1971.