Philippine Geothermal Inc & National Power Corporation. (2001). Geothermal energy primer. Philippine Geothermal, Inc.
Cita Chicago (17th ed.)Philippine Geothermal Inc i National Power Corporation. Geothermal Energy Primer. Manila: Philippine Geothermal, Inc, 2001.
Cita MLA (9th ed.)Philippine Geothermal Inc i National Power Corporation. Geothermal Energy Primer. Philippine Geothermal, Inc, 2001.
Atenció: Aquestes cites poden no estar 100% correctes.