World Trade Press & ebrary, Inc. (2010). Bulgaria: Communications. World Trade Press.
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Chicago-čujuhus (17. p.)
World Trade Press juo Inc ebrary. Bulgaria: Communications. Petaluma, Calif.: World Trade Press, 2010.
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MLA-čujuhus (9. p.)
World Trade Press juo Inc ebrary. Bulgaria: Communications. World Trade Press, 2010.
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