Schumpeter, J. A., & Opie, R. (1983). The theory of economic development: An inquiry into profits, capital, credit, interest, and the business cycle. Transaction Books.

Schumpeter, Joseph A., and Redvers Opie. The Theory of Economic Development: An Inquiry into Profits, Capital, Credit, Interest, and the Business Cycle. New Brunswick, N.J.: Transaction Books, 1983.

Schumpeter, Joseph A., and Redvers Opie. The Theory of Economic Development: An Inquiry into Profits, Capital, Credit, Interest, and the Business Cycle. Transaction Books, 1983.