APA (7th ed.) Citation

Christopher, H., & Armstead, H. (1974). Geothermal energy: Review of research and development. Unesco Press.

Chicago Style (17th ed.) Citation

Christopher, H., and H. Armstead. Geothermal Energy: Review of Research and Development. Paris: Unesco Press, 1974.

MLA (9th ed.) Citation

Christopher, H., and H. Armstead. Geothermal Energy: Review of Research and Development. Unesco Press, 1974.