Cita APA (7th ed.)

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

Cita Chicago (17th ed.)

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

Cita MLA (9th ed.)

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