Gaya APA
Dipippo, R. (1980).
Geothermal energy as a source of electricity. (1980).
:
Washington : U.S. Departement of Energy,.
Gaya MLA
Dipippo, Ronald..
"Geothermal energy as a source of electricity.".
1980
:
Washington : U.S. Departement of Energy,,
1980.
Text.