APA-referens (7:e uppl.)

Leftwich, R. H. (1970). The price system and resource allocation (4th ed.). National Bookstore.

Chicago-referens (17:e uppl.)

Leftwich, Richard H. The Price System and Resource Allocation. 4th ed. Manila: National Bookstore, 1970.

MLA-referens (9:e uppl.)

Leftwich, Richard H. The Price System and Resource Allocation. 4th ed. National Bookstore, 1970.