Webster, E. (1999). The economics of intangible investment. Edward Elgar.
芝加哥风格引文Webster, Elizabeth. The Economics of Intangible Investment. Cheltenham: Edward Elgar, 1999.
MLA引文Webster, Elizabeth. The Economics of Intangible Investment. Edward Elgar, 1999.
警告：这些引文格式不一定是100％准确.