Baumol, W. J. (1994). Microeconomics: Principles and policy (6th ed.). The Dryden Press.

Baumol, William J. Microeconomics: Principles and Policy. 6th ed. New York: The Dryden Press, 1994.

Baumol, William J. Microeconomics: Principles and Policy. 6th ed. The Dryden Press, 1994.