Okun, B. (1961). Studies in economic development. Holt.
Cita Chicago (17th ed.)Okun, Bernard. Studies in Economic Development. New York: Holt, 1961.
Cita MLA (9th ed.)Okun, Bernard. Studies in Economic Development. Holt, 1961.
Atenció: Aquestes cites poden no estar 100% correctes.