Lua APA (7ú heag.)
ebrary, Inc. (2010). The future of the natural gas market in South East Europe. World Bank.
Lua i Stíl Chicago (17ú heag.)
ebrary, Inc. The Future of the Natural Gas Market in South East Europe. Washington, D.C.: World Bank, 2010.
Lua MLA (9ú heag.)
ebrary, Inc. The Future of the Natural Gas Market in South East Europe. World Bank, 2010.
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