Gaya APA
Physical geology. (2016).
New York:
McGraw-Hill Education.
Gaya Chicago
Physical geology.
15.
New York:
McGraw-Hill Education,
2016.
Buku.
Gaya MLA
Physical geology.
15.
New York:
McGraw-Hill Education,
2016.
Buku.
Gaya Turabian
Physical geology.
New York:
McGraw-Hill Education,
2016.
Buku.