APA-viite (7. p.)
ProQuest (Firm). (2011). Aid for trade at a glance 2011: Showing results. World Trade Organization : OECD.
Chicago-viite (17. p.)
ProQuest (Firm). Aid for Trade at a Glance 2011: Showing Results. [Paris]: World Trade Organization : OECD, 2011.
MLA-viite (9. p.)
ProQuest (Firm). Aid for Trade at a Glance 2011: Showing Results. World Trade Organization : OECD, 2011.
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