Hooker, A. A. (1939). The international grain trade. Sir I. Pitman & Sons.
芝加哥风格引文Hooker, Albert Ayerst. The International Grain Trade. London: Sir I. Pitman & Sons, 1939.
MLA引文Hooker, Albert Ayerst. The International Grain Trade. Sir I. Pitman & Sons, 1939.
警告：这些引文格式不一定是100％准确.