Walker, T. C., & Miller, R. K. (1990). Geographic information systems: An assessment of technology, applications, and products (2nd ed.). SEAI Technical Publications.
Chicago Style (17th ed.) CitationWalker, Terri C., and Richard K. Miller. Geographic Information Systems: An Assessment of Technology, Applications, and Products. 2nd ed. Madison, GA: SEAI Technical Publications, 1990.
MLA (9th ed.) CitationWalker, Terri C., and Richard K. Miller. Geographic Information Systems: An Assessment of Technology, Applications, and Products. 2nd ed. SEAI Technical Publications, 1990.
Warning: These citations may not always be 100% accurate.