Lua APA (7ú heag.)

(1957). Three Essays On The State Of Economic Science / Tjalling C. Koopmans. McGraw-Hill.

Lua i Stíl Chicago (17ú heag.)

Three Essays On The State Of Economic Science / Tjalling C. Koopmans. McGraw-Hill, 1957.

Lua MLA (8ú heag.)

Three Essays On The State Of Economic Science / Tjalling C. Koopmans. McGraw-Hill, 1957.

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