Archival documents : providing accountability through recordkeeping
edited by Sue McKemmish, Frank Upward
Ancora Press, 1993
 Buku Teks SO
Chrisman, Nicholas
Exploring geographic information system
John Wiley & Sons, 1997
 Buku Teks SO
Martin, David
Geographic information systems : socioeconomic applications
Routledge , 1996
 Buku Teks SO
Wadsworth, Richard
Geographical information systems for ecology: an introduction/Richard Wadsworth & Jo Treweek
Longman limited , 1999
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DeMers, Michael N.
Fundamentals of geographic information systems / Michael N. DeMers
John Wiley & Sons, 1997
 Buku Teks SO