Παραπομπή APA

Koopmans, T. C. (1957). Three essays on the state of eocnomic science. McGraw Hill.

Παραπομπή Chicago Style

Koopmans, Tjalling C. Three Essays on the State of Eocnomic Science. New York: McGraw Hill, 1957.

Παραπομπή MLA

Koopmans, Tjalling C. Three Essays on the State of Eocnomic Science. McGraw Hill, 1957.