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Lua i Stíl Chicago (17ú heag.)ebrary, Inc, agus Gertrude Enderle-Burcel. Gaps in the Iron Curtain: Economic Relations Between Neutral and Socialist Countries in Cold War Europe. Krakow: Jagiellonian University Press, 2009.
Lua MLA (9ú heag.)ebrary, Inc, agus Gertrude Enderle-Burcel. Gaps in the Iron Curtain: Economic Relations Between Neutral and Socialist Countries in Cold War Europe. Jagiellonian University Press, 2009.
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