APA (7 वां संस्करण) प्रशस्ति पत्र

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

शिकागो शैली (17वां संस्करण) प्रशस्ति पत्र

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

एमएलए (8वां संस्करण) प्रशस्ति पत्र

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