International Symposium on Spatial Data Handling Edinburgh, Scotland, International Geographical Union. Commission on GIS, Association for Geographic Information, Waugh, T. C., & Healey, R. G. (1994). Advances in GIS research: Proceedings of the Sixth International Symposium on Spatial Data Handling. Taylor & Francis.
Trích dẫn kiểu Chicago (xuất bản lần thứ 7)International Symposium on Spatial Data Handling Edinburgh, Scotland, International Geographical Union. Commission on GIS, Association for Geographic Information, Thomas C. Waugh, và Richard G. Healey. Advances in GIS Research: Proceedings of the Sixth International Symposium on Spatial Data Handling. London: Taylor & Francis, 1994.
Trích dẫn kiểu MLA (xuất bản lần thứ 9)International Symposium on Spatial Data Handling Edinburgh, Scotland, et al. Advances in GIS Research: Proceedings of the Sixth International Symposium on Spatial Data Handling. Taylor & Francis, 1994.