Penggayaan APA
BUTZER, Karl W.. (1976).
Geomorphology from the earth .
New York:
Harper Row Publishers.
Chicago Style
BUTZER, Karl W..
Geomorphology from the earth.
New York:
Harper Row Publishers,
1976.
Buku.
MLA Style
BUTZER, Karl W..
Geomorphology from the earth.
New York:
Harper Row Publishers,
1976.
Buku.
Turabian Style
BUTZER, Karl W..
Geomorphology from the earth.
New York:
Harper Row Publishers,
1976.
Buku.