Παραπομπή APA

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

Παραπομπή Chicago Style

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

Παραπομπή MLA

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

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