Cita APA (7a ed.)

Ekirch, A. A. (1944). The Idea of Progress in America, 1815-1860. Columbia University.

Cita Chicago Style (17a ed.)

Ekirch, Arthur Alphonse. The Idea of Progress in America, 1815-1860. New York: Columbia University, 1944.

Cita MLA (9a ed.)

Ekirch, Arthur Alphonse. The Idea of Progress in America, 1815-1860. Columbia University, 1944.