Cita APA (7a ed.)

ARMSTEAD, C. H. Geothermal energy its past, present and future contributions to the energy needs of man. E & FN Spon Ltd.

Cita Chicago Style (17a ed.)

ARMSTEAD, Christopher H. Geothermal Energy Its Past, Present and Future Contributions to the Energy Needs of Man. E & FN Spon Ltd.

Cita MLA (8a ed.)

ARMSTEAD, Christopher H. Geothermal Energy Its Past, Present and Future Contributions to the Energy Needs of Man. E & FN Spon Ltd.