APA Style
David M. Helgren, dkk. (1985).
World Geography Today .
Jakarta:
CV Usaha Nasional.
Chicago Style
David M. Helgren, dkk.
World Geography Today.
Jakarta:
CV Usaha Nasional,
1985.
Text.
MLA Style
David M. Helgren, dkk.
World Geography Today.
Jakarta:
CV Usaha Nasional,
1985.
Text.
Turabian Style
David M. Helgren, dkk.
World Geography Today.
Jakarta:
CV Usaha Nasional,
1985.
Print.