Gaya APA
Aronoff. (1989).
Geographic Information Systems .
Canada:
WDL.
Gaya Chicago
Aronoff.
Geographic Information Systems.
Canada:
WDL,
1989.
Text.
Gaya MLA
Aronoff.
Geographic Information Systems.
Canada:
WDL,
1989.
Text.
Gaya Turabian
Aronoff.
Geographic Information Systems.
Canada:
WDL,
1989.
Print.