431131 Muller-Kraenner, S. (2008). Energy security. London : Earthscan Publications Ltd..
Lua i Stíl Chicago (17ú heag.)431131 Muller-Kraenner, Sascha. Energy Security. London : Earthscan Publications Ltd., 2008.
Lua MLA (9ú heag.)431131 Muller-Kraenner, Sascha. Energy Security. London : Earthscan Publications Ltd., 2008.
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