U.S. Environmental Protection Agency. Inventory of the U.S. greenhouse gas emissions and sinks , 1990-2010.
Lua i Stíl Chicago (17ú heag.)U.S. Environmental Protection Agency. Inventory of the U.S. Greenhouse Gas Emissions and Sinks , 1990-2010.
Lua MLA (9ú heag.)U.S. Environmental Protection Agency. Inventory of the U.S. Greenhouse Gas Emissions and Sinks , 1990-2010.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.