Armstead, H. C. H. (1983). Geothermal energy: Its past, present, and future contributions to the energy needs of man (2nd ed.). E. & F.N. Spon.
Chicago-referens (17:e uppl.)Armstead, H. Christopher H. Geothermal Energy: Its Past, Present, and Future Contributions to the Energy Needs of Man. 2nd ed. London: E. & F.N. Spon, 1983.
MLA-referens (9:e uppl.)Armstead, H. Christopher H. Geothermal Energy: Its Past, Present, and Future Contributions to the Energy Needs of Man. 2nd ed. E. & F.N. Spon, 1983.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.