Heilbroner, R. L. (1968). The Economic Problem. Prentice-Hall of India.
Chicago Edition CitationHeilbroner, Robert L. The Economic Problem. New Jersey: Prentice-Hall of India, 1968.
Cita MLAHeilbroner, Robert L. The Economic Problem. Prentice-Hall of India, 1968.
Atenció: Aquestes cites poden no estar 100% correctes.