APA Style
Webster, David. (1993).
UNDERSTANDING GEOLOGY .
London:
Oliver ang Boyd.
Chicago Style
Webster, David.
UNDERSTANDING GEOLOGY.
London:
Oliver ang Boyd,
1993.
Text.
MLA Style
Webster, David.
UNDERSTANDING GEOLOGY.
London:
Oliver ang Boyd,
1993.
Text.
Turabian Style
Webster, David.
UNDERSTANDING GEOLOGY.
London:
Oliver ang Boyd,
1993.
Print.