Soule, G. H. (1961). Economics: Measurement, theories, case studies. Holt, Rinehart and WInston.
Cita Chicago (17th ed.)Soule, George Henry. Economics: Measurement, Theories, Case Studies. New York: Holt, Rinehart and WInston, 1961.
Cita MLA (9th ed.)Soule, George Henry. Economics: Measurement, Theories, Case Studies. Holt, Rinehart and WInston, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.