Gaya APA
GIS tutorial 1: basic workbook. (2011).
California:
Esri Press.
Gaya Chicago
GIS tutorial 1: basic workbook.
.
California:
Esri Press,
2011.
Buku.
Gaya MLA
GIS tutorial 1: basic workbook.
.
California:
Esri Press,
2011.
Buku.
Gaya Turabian
GIS tutorial 1: basic workbook.
California:
Esri Press,
2011.
Buku.