Aubrecht, G. J. (2006). Energy: Physical, environmental, and social impact (3rd ed.). Prentice Hall.
Lua i Stíl Chicago (17ú heag.)Aubrecht, Gordon J. Energy: Physical, Environmental, and Social Impact. 3rd ed. Upper Saddle River, N.J: Prentice Hall, 2006.
Lua MLA (9ú heag.)Aubrecht, Gordon J. Energy: Physical, Environmental, and Social Impact. 3rd ed. Prentice Hall, 2006.
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