Hultgren, T. (1965). Cost, prices, and profits, their cyclical relations. National Bureau of Economic Research.
芝加哥风格引文Hultgren, Thor. Cost, Prices, and Profits, Their Cyclical Relations. New York: National Bureau of Economic Research, 1965.
MLA引文Hultgren, Thor. Cost, Prices, and Profits, Their Cyclical Relations. National Bureau of Economic Research, 1965.
警告：这些引文格式不一定是100％准确.