Gaya APA
f, W., walh, E, F.
(1977).
geolthermal energy utilization
.
Canada:
New York : John Wiley & Sons, Inc.,.
Gaya MLA
f, Wahl,edward., walh, Edward, F.
"geolthermal energy utilization".
Canada:
New York : John Wiley & Sons, Inc.,,
1977.
Text.