APA-referens (7:e uppl.)

Leftwich, R. H. (1966). The price system and resource allocation (3rd ed.). Holt, Rinehart and winston.

Chicago-referens (17:e uppl.)

Leftwich, Richard H. The Price System and Resource Allocation. 3rd ed. New York: Holt, Rinehart and winston, 1966.

MLA-referens (9:e uppl.)

Leftwich, Richard H. The Price System and Resource Allocation. 3rd ed. Holt, Rinehart and winston, 1966.