APA (7th ed.) Citation

Henry, A., Dugmore, A., & Newton, A. (2009). Using Google Earth for Internet GIS.

Chicago Style (17th ed.) Citation

Henry, Andrew, Andy Dugmore, and Anthony Newton. Using Google Earth for Internet GIS. 2009.

MLA (9th ed.) Citation

Henry, Andrew, et al. Using Google Earth for Internet GIS. 2009.