APA (7th ed.) Citation

Clark, K. B., & Summers, L. H. (1980). Demographic differences in cyclical employment variation. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Clark, Kim B., and Lawrence Henry Summers. Demographic Differences in Cyclical Employment Variation. Cambridge, Mass: National Bureau of Economic Research, 1980.

MLA (9th ed.) Citation

Clark, Kim B., and Lawrence Henry Summers. Demographic Differences in Cyclical Employment Variation. National Bureau of Economic Research, 1980.