Dyfyniad APA
Jensen, R. R. (2014). Geographic information systems exercise workbook. Prentice Hall.
Dyfyniad Arddull Chicago
Jensen, Ryan R. Geographic Information Systems Exercise Workbook. Boston, Mass: Prentice Hall, 2014.
Dyfyniad MLA
Jensen, Ryan R. Geographic Information Systems Exercise Workbook. Prentice Hall, 2014.
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