International Trade Centre UNCTAD/GATT. (1975). Trade information classification. The Centre.
芝加哥风格引文International Trade Centre UNCTAD/GATT. Trade Information Classification. Geneva: The Centre, 1975.
MLA引文International Trade Centre UNCTAD/GATT. Trade Information Classification. The Centre, 1975.
警告：这些引文格式不一定是100％准确.