APA ציטוט

Kruger, P. O. C. (1973). Geothermal energy: Resources, production stimulation. University press.

Chicago Edition Citation

Kruger, Paul Otte Carel. Geothermal Energy: Resources, Production Stimulation. California: University press, 1973.

ציטוט MLA

Kruger, Paul Otte Carel. Geothermal Energy: Resources, Production Stimulation. University press, 1973.