APA (7th ed.) Citation

Heilbroner, R. L. (1981). The economic problem (6th ed.). Simon & Schuster.

Chicago Style (17th ed.) Citation

Heilbroner, Robert L. The Economic Problem. 6th ed. New York: Simon & Schuster, 1981.

MLA (9th ed.) Citation

Heilbroner, Robert L. The Economic Problem. 6th ed. Simon & Schuster, 1981.