APA (7th ed.) Zitazioa

Friedman, M. (1966). Essays in positive economics. University of Chicago.

Chicago Style (17th ed.) Zitazioa

Friedman, Milton,1912-. Essays in Positive Economics. Chicago: University of Chicago, 1966.

MLA (9th ed.) Zitazioa

Friedman, Milton,1912-. Essays in Positive Economics. University of Chicago, 1966.