APA (7th ed.) Citation

De By, I. R. (1999). Syllabus on principles of geogrpahic information systems: ITC core module. International Institute for Geo-information Science and Earth Observation.

Chicago Style (17th ed.) Citation

De By, Ir. R.A. Syllabus on Principles of Geogrpahic Information Systems: ITC Core Module. Enschede, The Netherlands: International Institute for Geo-information Science and Earth Observation, 1999.

MLA (9th ed.) Citation

De By, Ir. R.A. Syllabus on Principles of Geogrpahic Information Systems: ITC Core Module. International Institute for Geo-information Science and Earth Observation, 1999.