Gaya APA
Physical Geology. (1985).
Iowa:
Wm C Brown Publisher.
Gaya Chicago
Physical Geology.
Ed.3.
Iowa:
Wm C Brown Publisher,
1985.
.
Gaya MLA
Physical Geology.
Ed.3.
Iowa:
Wm C Brown Publisher,
1985.
.
Gaya Turabian
Physical Geology.
Iowa:
Wm C Brown Publisher,
1985.
.