APA Style

Gupta, Harsh, Roy, Sukanta. (2008). Geothermal Energy : an alternative resource for the 21st century . Oxford: Elsevier.

Chicago Style

Gupta, Harsh, Roy, Sukanta. Geothermal Energy : an alternative resource for the 21st century. Oxford: Elsevier, 2008. Text.

MLA Style

Gupta, Harsh, Roy, Sukanta. Geothermal Energy : an alternative resource for the 21st century. Oxford: Elsevier, 2008. Text.

Turabian Style

Gupta, Harsh, Roy, Sukanta. Geothermal Energy : an alternative resource for the 21st century. Oxford: Elsevier, 2008. Print.