APA citiranje

Heilbroner, R. L. (1968). The economic problem. New York: Prentice-Hall.

Trích dẫn kiểu Chicago

Heilbroner, Robert L. The Economic Problem. New York: Prentice-Hall, 1968.

MLA citiranje

Heilbroner, Robert L. The Economic Problem. New York: Prentice-Hall, 1968.