Cita APA (7th ed.)
Heilbroner, R. L. (1974). An inquiry into the human prospect. W.W. Norton.
Cita Chicago (17th ed.)
Heilbroner, Robert L. An Inquiry into the Human Prospect. New York: W.W. Norton, 1974.
Cita MLA (9th ed.)
Heilbroner, Robert L. An Inquiry into the Human Prospect. W.W. Norton, 1974.
Atenció: Aquestes cites poden no estar 100% correctes.