Παραπομπή APA

Krauger, P. (1973). Geothermal energy: Resources production, stimulation. Standard.

Παραπομπή Chicago Style

Krauger, Paul. Geothermal Energy: Resources Production, Stimulation. Carel Ottle: Standard, 1973.

Παραπομπή MLA

Krauger, Paul. Geothermal Energy: Resources Production, Stimulation. Standard, 1973.