APA-Zitierstil (7. Ausg.)

Gupta, H. K. (2007). Geothermal energy: An alternative resource for the 21st century. Elsevier.

Chicago-Zitierstil (17. Ausg.)

Gupta, Harsh K. Geothermal Energy: An Alternative Resource for the 21st Century. Amsterdam, the Netherlands: Elsevier, 2007.

MLA-Zitierstil (9. Ausg.)

Gupta, Harsh K. Geothermal Energy: An Alternative Resource for the 21st Century. Elsevier, 2007.