Gaya APA

Davis, Bruce E.. (2001). GIS : a visual approach (text). Singapore: Onword Press.

Gaya Chicago

Davis, Bruce E.. GIS : a visual approach. text Singapore: Onword Press, 2001. Tesis.

Gaya MLA

Davis, Bruce E.. GIS : a visual approach. text Singapore: Onword Press, 2001. Tesis.

Gaya Turabian

Davis, Bruce E.. GIS : a visual approach. text Singapore: Onword Press, 2001. Tesis.