(2010). 2009 international trade statistics yearbook, Volume I, Trade by country. United Nations.
Chicago-Zitierstil (17. Ausg.)2009 International Trade Statistics Yearbook, Volume I, Trade by Country. New York: United Nations, 2010.
MLA-Zitierstil (9. Ausg.)2009 International Trade Statistics Yearbook, Volume I, Trade by Country. United Nations, 2010.
Achtung: Diese Zitate sind unter Umständen nicht zu 100% korrekt.