Gaya APA
Crawford, Mark J.. (1998).
Physical Geology (Ed. 1).
Nebraska:
Cliffs Notes., Inc..
Gaya Chicago
Crawford, Mark J..
Physical Geology.
Ed. 1
Nebraska:
Cliffs Notes., Inc.,
1998.
Text.
Gaya MLA
Crawford, Mark J..
Physical Geology.
Ed. 1
Nebraska:
Cliffs Notes., Inc.,
1998.
Text.
Gaya Turabian
Crawford, Mark J..
Physical Geology.
Ed. 1
Nebraska:
Cliffs Notes., Inc.,
1998.
Print.