Powell, A. A. (1974). Empirical analytics of demand systems. Lexington Books.
芝加哥风格引文Powell, Alan A. Empirical Analytics of Demand Systems. Lexington, Mass.: Lexington Books, 1974.
MLA引文Powell, Alan A. Empirical Analytics of Demand Systems. Lexington Books, 1974.
警告：这些引文格式不一定是100％准确.