Cita APA (7a ed.)

Heilbroner, R. L. (1960). The future as history: The historic currents of our time and the direction in which they are taking America. Harper & Row.

Cita Chicago Style (17a ed.)

Heilbroner, Robert L. The Future as History: The Historic Currents of Our Time and the Direction in Which They Are Taking America. New York [etc.]: Harper & Row, 1960.

Cita MLA (9a ed.)

Heilbroner, Robert L. The Future as History: The Historic Currents of Our Time and the Direction in Which They Are Taking America. Harper & Row, 1960.