APA (7e ed.) Bronvermelding

Heilbroner, R. L., & Thurow, L. C. (1975). The economic problem (4th ed.). Prentice-Hall.

Chicago (17e ed.) Bronvermelding

Heilbroner, Robert L., en Lester C. Thurow. The Economic Problem. 4th ed. Englewood Cliffs, N.J.: Prentice-Hall, 1975.

MLA (8e ed.) Bronvermelding

Heilbroner, Robert L., en Lester C. Thurow. The Economic Problem. 4th ed. Prentice-Hall, 1975.