Gaya APA
Callister, W, D., Allen, D, W. (2011).
GIS tutorial 2 for Arc GIS 10: spatial analysis workbook .
California:
ESRI Press.
Gaya MLA
Callister, William, D.., Allen, David, W..
"GIS tutorial 2 for Arc GIS 10: spatial analysis workbook".
California:
ESRI Press,
2011.
Text.