UN. (1984). Commodity Trade (By Sea) Statistics: 1981 Maritime Transport Study: Analysis By Type Of Goods Moved During1978-1981 Between Regions Of The World (1. Edisyon.). UN.DIESA.
Chicago Style (17. basım) AtıfUN. Commodity Trade (By Sea) Statistics: 1981 Maritime Transport Study: Analysis By Type Of Goods Moved During1978-1981 Between Regions Of The World. 1. Edisyon. New York: UN.DIESA, 1984.
MLA (9th ed.) AtıfUN. Commodity Trade (By Sea) Statistics: 1981 Maritime Transport Study: Analysis By Type Of Goods Moved During1978-1981 Between Regions Of The World. 1. Edisyon. UN.DIESA, 1984.
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