Helcké, G., & Helcke, G. (1981). The energy saving guide: Tables for assessing the profitability of energy saving measures with explanatory notes and worked examples. Oxford [etc.]: Pergamon.
Chicago Style CitationHelcké, George., and G. Helcke. The Energy Saving Guide: Tables for Assessing the Profitability of Energy Saving Measures With Explanatory Notes and Worked Examples. Oxford [etc.]: Pergamon, 1981.
MLA CitationHelcké, George., and G. Helcke. The Energy Saving Guide: Tables for Assessing the Profitability of Energy Saving Measures With Explanatory Notes and Worked Examples. Oxford [etc.]: Pergamon, 1981.
Warning: These citations may not always be 100% accurate.