Leftwich, R. H. (1970). The price system and resource allocation (4th ed.). National Bookstore.
芝加哥风格引文Leftwich, Richard H. The Price System and Resource Allocation. 4th ed. Manila: National Bookstore, 1970.
MLA引文Leftwich, Richard H. The Price System and Resource Allocation. 4th ed. National Bookstore, 1970.
警告：这些引文格式不一定是100％准确.