Gaya APA
KELLER, Edward A.. (1976).
Environmental Geology .
New York:
Merrill Publishing Company.
Gaya Chicago
KELLER, Edward A..
Environmental Geology.
New York:
Merrill Publishing Company,
1976.
Teks.
Gaya MLA
KELLER, Edward A..
Environmental Geology.
New York:
Merrill Publishing Company,
1976.
Teks.
Gaya Turabian
KELLER, Edward A..
Environmental Geology.
New York:
Merrill Publishing Company,
1976.
Teks.