Abraham, D. S. (2015). The elements of power: Gadgets, guns, and the struggle for a sustainable future in the rare metal age. Yale University Press.
Lua i Stíl Chicago (17ú heag.)Abraham, David S. The Elements of Power: Gadgets, Guns, and the Struggle for a Sustainable Future in the Rare Metal Age. New Haven,CT: Yale University Press, 2015.
Lua MLA (9ú heag.)Abraham, David S. The Elements of Power: Gadgets, Guns, and the Struggle for a Sustainable Future in the Rare Metal Age. Yale University Press, 2015.
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