APA (7th ed.) Citation

Helcké, G. (1981). The energy saving guide: Tables for assessing the profitability of energy saving measures with explanatory notes and worked examples. Pergamon Press.

Chicago Style (17th ed.) Citation

Helcké, George. The Energy Saving Guide: Tables for Assessing the Profitability of Energy Saving Measures with Explanatory Notes and Worked Examples. Oxford: Pergamon Press, 1981.

MLA (9th ed.) Citation

Helcké, George. The Energy Saving Guide: Tables for Assessing the Profitability of Energy Saving Measures with Explanatory Notes and Worked Examples. Pergamon Press, 1981.