Cita APA (7th ed.)

Wagner, L. A. (2002). Materials in the economy, material flows, scarcity, and the environment. U.S. Dept. of the Interior, U.S. Geological Survey.

Cita 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.

Cita 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.