Heilbroner, R. L. (1968). The economic problem. New York: Prentice-Hall.
シカゴスタイル引用形Heilbroner, Robert L. The Economic Problem. New York: Prentice-Hall, 1968.
MLA引用形式Heilbroner, Robert L. The Economic Problem. New York: Prentice-Hall, 1968.
警告: この引用は必ずしも正確ではありません.