Greenwald, W. I., & Hultgren, T. (1953). Transport and the state of trade in Britain. National Bureau of Economic Research.
芝加哥风格引文Greenwald, William I., 与 Thor Hultgren. Transport and the State of Trade in Britain. New York: National Bureau of Economic Research, 1953.
MLA引文Greenwald, William I., 与 Thor Hultgren. Transport and the State of Trade in Britain. National Bureau of Economic Research, 1953.
警告：这些引文格式不一定是100％准确.