APA (7th ed.) Citation

Siegel, D. (1991). Errors in output deflators revisited: Unit values and the PPI. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Siegel, Donald. Errors in Output Deflators Revisited: Unit Values and the PPI. Cambridge, Mass: National Bureau of Economic Research, 1991.

MLA (9th ed.) Citation

Siegel, Donald. Errors in Output Deflators Revisited: Unit Values and the PPI. National Bureau of Economic Research, 1991.