Gaya APA
Feather, Ralph M et..al. (2002).
The Changing Surface of Earth .
USA:
Glencoe McGraw-Hill.
Gaya Chicago
Feather, Ralph M et..al.
The Changing Surface of Earth.
USA:
Glencoe McGraw-Hill,
2002.
Buku.
Gaya MLA
Feather, Ralph M et..al.
The Changing Surface of Earth.
USA:
Glencoe McGraw-Hill,
2002.
Buku.
Gaya Turabian
Feather, Ralph M et..al.
The Changing Surface of Earth.
USA:
Glencoe McGraw-Hill,
2002.
Buku.