Gaya APA
PHYSICAL GEOLOGY: Exploring The Earth. (1992).
USA:
West Publishing Company.
Gaya Chicago
PHYSICAL GEOLOGY: Exploring The Earth.
.
USA:
West Publishing Company,
1992.
Buku.
Gaya MLA
PHYSICAL GEOLOGY: Exploring The Earth.
.
USA:
West Publishing Company,
1992.
Buku.
Gaya Turabian
PHYSICAL GEOLOGY: Exploring The Earth.
USA:
West Publishing Company,
1992.
Buku.