SpringerLink (Online service) & Xiao, N. (2012). Geographic information science: 7th International Conference, GIScience 2012, Columbus, OH, USA, September 18-21, 2012. Proceedings. Imprint: Springer.
Lua i Stíl Chicago (17ú heag.)SpringerLink (Online service) agus Ningchuan Xiao. Geographic Information Science: 7th International Conference, GIScience 2012, Columbus, OH, USA, September 18-21, 2012. Proceedings. Berlin, Heidelberg: Imprint: Springer, 2012.
Lua MLA (8ú heag.)SpringerLink (Online service) agus Ningchuan Xiao. Geographic Information Science: 7th International Conference, GIScience 2012, Columbus, OH, USA, September 18-21, 2012. Proceedings. Imprint: Springer, 2012.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.