Παραπομπή APA

Wahl, E. F. (1977). Geothermal energy utilization. Wiley.

Παραπομπή Chicago Style

Wahl, Edward F. Geothermal Energy Utilization. New York: Wiley, 1977.

Παραπομπή MLA

Wahl, Edward F. Geothermal Energy Utilization. Wiley, 1977.