Lua APA (7ú heag.)
Hjelmar, O. (2009). Treatment methods for waste to be landfilled. Nordic Council of Ministers.
Lua i Stíl Chicago (17ú heag.)
Hjelmar, Ole. Treatment Methods for Waste to Be Landfilled. Copenhagen: Nordic Council of Ministers, 2009.
Lua MLA (9ú heag.)
Hjelmar, Ole. Treatment Methods for Waste to Be Landfilled. Nordic Council of Ministers, 2009.
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