Wulfinghoff, D. R. Energy Efficiency Manual: Or Everyone who Uses Energy, Pays for Utilities, Controls Energy Usage, Designs and Builds, Is Interested in Energy and Environmental Preservation. Energy Institute.
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Chicago-viite (17. p.)
Wulfinghoff, Donald R. Energy Efficiency Manual: Or Everyone Who Uses Energy, Pays for Utilities, Controls Energy Usage, Designs and Builds, Is Interested in Energy and Environmental Preservation. Wheaton, EUA: Energy Institute.
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MLA-viite (9. p.)
Wulfinghoff, Donald R. Energy Efficiency Manual: Or Everyone Who Uses Energy, Pays for Utilities, Controls Energy Usage, Designs and Builds, Is Interested in Energy and Environmental Preservation. Energy Institute.
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