APA (7th ed.) Citation

Romer, P. M. (1995). Why, indeed, in American: Theory, history, and the origins of modern economic growth. National Bureau of Economic Research.

Chicago Style (17th ed.) Citation

Romer, Paul M. Why, Indeed, in American: Theory, History, and the Origins of Modern Economic Growth. Cambridge: National Bureau of Economic Research, 1995.

MLA (9th ed.) Citation

Romer, Paul M. Why, Indeed, in American: Theory, History, and the Origins of Modern Economic Growth. National Bureau of Economic Research, 1995.