Montgomery, G. E., & Schuch, H. C. (1993). GIS data conversion handbook. GIS World.
Lua i Stíl Chicago (17ú heag.)Montgomery, Glenn E., agus Harold C. Schuch. GIS Data Conversion Handbook. Ft. Collins, CO: GIS World, 1993.
Lua MLA (8ú heag.)Montgomery, Glenn E., agus Harold C. Schuch. GIS Data Conversion Handbook. GIS World, 1993.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.