Stamp, L. (1973). An Intermediate commercial geography P-I Commodities & world trade (5th.). Longman Group ltd.
芝加哥风格引文Stamp, L. An Intermediate Commercial Geography P-I Commodities & World Trade. 5th. London: Longman Group ltd, 1973.
MLA引文Stamp, L. An Intermediate Commercial Geography P-I Commodities & World Trade. 5th. Longman Group ltd, 1973.
警告：这些引文格式不一定是100％准确.