APA-viite (7. p.)
Westra, E. (2010). Python geospatial development: Build a complete and sophisticated mapping application from scratch using Python tools for GIS development. Packt Open Source.
Chicago-viite (17. p.)
Westra, Erik. Python Geospatial Development: Build a Complete and Sophisticated Mapping Application from Scratch Using Python Tools for GIS Development. Birmingham, U.K.: Packt Open Source, 2010.
MLA-viite (9. p.)
Westra, Erik. Python Geospatial Development: Build a Complete and Sophisticated Mapping Application from Scratch Using Python Tools for GIS Development. Packt Open Source, 2010.
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