APA (7th ed.) Citation

Castle, G. H. (1993). Profiting from a geographic information system. GIS World Books.

Chicago Style (17th ed.) Citation

Castle, Gilbert H. Profiting from a Geographic Information System. Colorado: GIS World Books, 1993.

MLA (8th ed.) Citation

Castle, Gilbert H. Profiting from a Geographic Information System. GIS World Books, 1993.

Warning: These citations may not always be 100% accurate.