Gaya APA
Understanding GIS : The ARC/INFO Method. (1990).
U.S.A:
Enviromental Systems Research Institute. INC.
Gaya Chicago
Understanding GIS : The ARC/INFO Method.
Pertama.
U.S.A:
Enviromental Systems Research Institute. INC,
1990.
Text.
Gaya MLA
Understanding GIS : The ARC/INFO Method.
Pertama.
U.S.A:
Enviromental Systems Research Institute. INC,
1990.
Text.
Gaya Turabian
Understanding GIS : The ARC/INFO Method.
U.S.A:
Enviromental Systems Research Institute. INC,
1990.
Print.