Cita APA (7th ed.)

Koopmans, T. C. (1957). Three essays on the state of economic science (Paperback edition.). McGraw-Hill.

Cita Chicago (17th ed.)

Koopmans, Tjalling C. Three Essays on the State of Economic Science. Paperback edition. New York: McGraw-Hill, 1957.

Cita MLA (8th ed.)

Koopmans, Tjalling C. Three Essays on the State of Economic Science. Paperback edition. McGraw-Hill, 1957.