Cita APA (7a ed.)

Hofstadter, R. (1944). Social darwinism in American Thought: 1860-1915. University of Pennsylvania.

Cita Chicago Style (17a ed.)

Hofstadter, Richard. Social Darwinism in American Thought: 1860-1915. Philadelphia: University of Pennsylvania, 1944.

Cita MLA (8a ed.)

Hofstadter, Richard. Social Darwinism in American Thought: 1860-1915. University of Pennsylvania, 1944.