Young, J. E., & Ayres, E. (1994). The next efficiency revolution: Creating a sustainable materials economy. Worldwatch Institute.
Citace podle Chicago (17th ed.)Young, John E., a Ed Ayres. The Next Efficiency Revolution: Creating a Sustainable Materials Economy. Washington, DC: Worldwatch Institute, 1994.
Citace podle MLA (9th ed.)Young, John E., a Ed Ayres. The Next Efficiency Revolution: Creating a Sustainable Materials Economy. Worldwatch Institute, 1994.
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