APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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