Einzig, P. (1966). Primitive Money (Second Edition). ELSEVIER.
Cita Chicago (17th ed.)Einzig, Paul. Primitive Money (Second Edition). ELSEVIER, 1966.
Cita MLA (8th ed.)Einzig, Paul. Primitive Money (Second Edition). ELSEVIER, 1966.
Atenció: Aquestes cites poden no estar 100% correctes.