Cita APA (7a ed.)
Koopmans, T. C. (1957). Three essays on the state of economic science. McGraw-Hill Book Co.
Cita Chicago Style (17a ed.)
Koopmans, Tjalling C. Three Essays on the State of Economic Science. New York: McGraw-Hill Book Co, 1957.
Cita MLA (9a ed.)
Koopmans, Tjalling C. Three Essays on the State of Economic Science. McGraw-Hill Book Co, 1957.
Precaución: Estas citas no son 100% exactas.