APA (7th ed.) Citation

Clark, K. B., & Freeman, R. B. (1979). How elastic is the demand for labor? National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Clark, Kim B., and Richard B. Freeman. How Elastic Is the Demand for Labor? Cambridge, Mass: National Bureau of Economic Research, 1979.

MLA (9th ed.) Citation

Clark, Kim B., and Richard B. Freeman. How Elastic Is the Demand for Labor? National Bureau of Economic Research, 1979.