Gaya APA
SPARKS, B.W.. (1960).
Geomorphology .
New York:
Longmans.
Gaya Chicago
SPARKS, B.W..
Geomorphology.
New York:
Longmans,
1960.
Teks.
Gaya MLA
SPARKS, B.W..
Geomorphology.
New York:
Longmans,
1960.
Teks.
Gaya Turabian
SPARKS, B.W..
Geomorphology.
New York:
Longmans,
1960.
Teks.