Lua APA (7ú heag.)

Margolis Nancy, Brindle Ross, & U.S. Department of Energy. Energy and environmental profile of the U.S. iron and steel industry.

Lua i Stíl Chicago (17ú heag.)

Margolis Nancy, Brindle Ross, agus U.S. Department of Energy. Energy and Environmental Profile of the U.S. Iron and Steel Industry.

Lua MLA (9ú heag.)

Margolis Nancy, et al. Energy and Environmental Profile of the U.S. Iron and Steel Industry.

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