APA (7e ed.) Bronvermelding

Leftwich, R. H. (1979). The price system and resource allocation (7th ed.). Dryden Press.

Chicago (17e ed.) Bronvermelding

Leftwich, Richard H. The Price System and Resource Allocation. 7th ed. Hinsdale, Ill.: Dryden Press, 1979.

MLA (8e ed.) Bronvermelding

Leftwich, Richard H. The Price System and Resource Allocation. 7th ed. Dryden Press, 1979.