Friedman, M. (1966). Essays in positive economics. University of Chicago.
Chicago-čujuhus (17. p.)Friedman, Milton,1912-. Essays in Positive Economics. Chicago: University of Chicago, 1966.
MLA-čujuhus (9. p.)Friedman, Milton,1912-. Essays in Positive Economics. University of Chicago, 1966.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.