Cita APA (7a ed.)
Friedman, M. Essays in Positive Economics. University of Chicago.
Cita estilo Chicago (17a ed.)
Friedman, Milton. Essays in Positive Economics. Chicago, EUA: University of Chicago.
Cita MLA (9a ed.)
Friedman, Milton. Essays in Positive Economics. University of Chicago.
警告：這些引文格式不一定是100％准確.