Cita APA (7a ed.)

Koopmans, T. C. (1965). On the concept of optimal economic growth. [s.n.].

Cita Chicago Style (17a ed.)

Koopmans, Tjalling Charles. On the Concept of Optimal Economic Growth. [S.l.]: [s.n.], 1965.

Cita MLA (9a ed.)

Koopmans, Tjalling Charles. On the Concept of Optimal Economic Growth. [s.n.], 1965.