GIS/LIS : Anaheim & American Congress on Surveying and Mapping. (1990). GIS: Proceedings, 7-10 November 1990, the Anaheim Hilton and Towers, Anaheim, California. American Society for Photogrammetry and Remote Sensing, American Congress on Surveying and Mapping.
Παραπομπή σε μορφή Chicago (17η εκδ.)GIS/LIS : Anaheim και American Congress on Surveying and Mapping. GIS: Proceedings, 7-10 November 1990, the Anaheim Hilton and Towers, Anaheim, California. Bethesda: American Society for Photogrammetry and Remote Sensing, American Congress on Surveying and Mapping, 1990.
Παραπομπή σε μορφή MLA (9th εκδ.)GIS/LIS : Anaheim και American Congress on Surveying and Mapping. GIS: Proceedings, 7-10 November 1990, the Anaheim Hilton and Towers, Anaheim, California. American Society for Photogrammetry and Remote Sensing, American Congress on Surveying and Mapping, 1990.