Mansfield, E. (1968). The economics of technological change. Longmans.
芝加哥风格引文Mansfield, Edwin. The Economics of Technological Change. [London]: Longmans, 1968.
MLA引文Mansfield, Edwin. The Economics of Technological Change. Longmans, 1968.
警告：这些引文格式不一定是100％准确.