APA (7th ed.) Citation

Greenhill, S., Venkatesh, S., & Nahrstedt, l. (2006). Virtual observers in a mobile surveillance system. ACM Press.

Chicago Style (17th ed.) Citation

Greenhill, Stewart, Svetha Venkatesh, and lara Nahrstedt. Virtual Observers in a Mobile Surveillance System. ACM Press, 2006.

MLA (9th ed.) Citation

Greenhill, Stewart, et al. Virtual Observers in a Mobile Surveillance System. ACM Press, 2006.