Wagner, L. A. (2002). Materials in the economy, material flows, scarcity, and the environment. U.S. Dept. of the Interior, U.S. Geological Survey.
Citace podle Chicago (17th ed.)Wagner, Lorie A. Materials in the Economy, Material Flows, Scarcity, and the Environment. Denver, CO: U.S. Dept. of the Interior, U.S. Geological Survey, 2002.
Citace podle MLA (9th ed.)Wagner, Lorie A. Materials in the Economy, Material Flows, Scarcity, and the Environment. U.S. Dept. of the Interior, U.S. Geological Survey, 2002.
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