Clark, C. (1951). The conditions of economic progress (2d ed. completely rewritten.). Macmillan.
芝加哥风格引文Clark, Colin. The Conditions of Economic Progress. 2d ed. completely rewritten. London: Macmillan, 1951.
MLA引文Clark, Colin. The Conditions of Economic Progress. 2d ed. completely rewritten. Macmillan, 1951.
警告：这些引文格式不一定是100％准确.