Cita APA (7th ed.)
Leftwich, R. H. (1979). The price system and resource allocation (7th ed.). Dryden.
Cita Chicago (17th ed.)
Leftwich, Richard H. The Price System and Resource Allocation. 7th ed. Illinois: Dryden, 1979.
Cita MLA (9th ed.)
Leftwich, Richard H. The Price System and Resource Allocation. 7th ed. Dryden, 1979.
Atenció: Aquestes cites poden no estar 100% correctes.