Gaya APA
WALKER. (2003).
APPLIED SUBSURFACE GEOLOGICAL MAPPING .
UNITED STATES OF AMERICA:
Prentice Hall.
Gaya Chicago
WALKER.
APPLIED SUBSURFACE GEOLOGICAL MAPPING.
UNITED STATES OF AMERICA:
Prentice Hall,
2003.
Text.
Gaya MLA
WALKER.
APPLIED SUBSURFACE GEOLOGICAL MAPPING.
UNITED STATES OF AMERICA:
Prentice Hall,
2003.
Text.
Gaya Turabian
WALKER.
APPLIED SUBSURFACE GEOLOGICAL MAPPING.
UNITED STATES OF AMERICA:
Prentice Hall,
2003.
Print.