APA (7th ed.) Citation

Chrisman, N. (2006). Charting the unknown : how computer mapping at Harvard became GIS / Nick Chrisman: How computer mapping at Harvard became GIS. ESRI Press.

Chicago Style (17th ed.) Citation

Chrisman, Nick. Charting the Unknown : How Computer Mapping at Harvard Became GIS / Nick Chrisman: How Computer Mapping at Harvard Became GIS. Redlands, Calif.: ESRI Press, 2006.

MLA (9th ed.) Citation

Chrisman, Nick. Charting the Unknown : How Computer Mapping at Harvard Became GIS / Nick Chrisman: How Computer Mapping at Harvard Became GIS. ESRI Press, 2006.

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