freeman, C. (1982). The economics of industrial innovation (2th. ed.). Christopher freeman.
芝加哥风格引文freeman, Christopher. The Economics of Industrial Innovation. 2th. ed. london: Christopher freeman, 1982.
MLA引文freeman, Christopher. The Economics of Industrial Innovation. 2th. ed. Christopher freeman, 1982.
警告：这些引文格式不一定是100％准确.