Παραπομπή σε μορφή APA (7η εκδ.)

Schumpeter, J. A., & Opie, R. (1961). The theory of economic development: An inquiry into profits, capital, credit, interest, and the business cycle. Oxford University Press.

Παραπομπή σε μορφή Chicago (17η εκδ.)

Schumpeter, Joseph Alois, και Redvers Opie. The Theory of Economic Development: An Inquiry into Profits, Capital, Credit, Interest, and the Business Cycle. New York: Oxford University Press, 1961.

Παραπομπή σε μορφή MLA (9th εκδ.)

Schumpeter, Joseph Alois, και Redvers Opie. The Theory of Economic Development: An Inquiry into Profits, Capital, Credit, Interest, and the Business Cycle. Oxford University Press, 1961.