Allen, D. W. (2016). GIS tutorial 2: Spatial analysis workbook. Esri press.
Chicago-čujuhus (17. p.)Allen, David W. GIS Tutorial 2: Spatial Analysis Workbook. New York: Esri press, 2016.
MLA-čujuhus (9. p.)Allen, David W. GIS Tutorial 2: Spatial Analysis Workbook. Esri press, 2016.
Muitte dárkkistit čujuhemiid riektatvuođa, ovdal go geavahat daid iežat deavsttas.