APA Style
Understanding GIS, The ARC/INFO Method : SELF-STUDY WORKBOOK, PC VERSION. (1990).
California:
Environmental Systems Research Institute, Inc..
Chicago Style
Understanding GIS, The ARC/INFO Method : SELF-STUDY WORKBOOK, PC VERSION.
.
California:
Environmental Systems Research Institute, Inc.,
1990.
Text.
MLA Style
Understanding GIS, The ARC/INFO Method : SELF-STUDY WORKBOOK, PC VERSION.
.
California:
Environmental Systems Research Institute, Inc.,
1990.
Text.
Turabian Style
Understanding GIS, The ARC/INFO Method : SELF-STUDY WORKBOOK, PC VERSION.
California:
Environmental Systems Research Institute, Inc.,
1990.
Print.