APA (7th ed.) Citation

Delong, J. B., & Summers, L. H. (1988). On the existence and interpretation of a "unit root" in U.S. GNP. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Delong, J. Bradford, and Lawrence Henry Summers. On the Existence and Interpretation of a "Unit Root" in U.S. GNP. Cambridge, Mass: National Bureau of Economic Research, 1988.

MLA (9th ed.) Citation

Delong, J. Bradford, and Lawrence Henry Summers. On the Existence and Interpretation of a "Unit Root" in U.S. GNP. National Bureau of Economic Research, 1988.