APA (7th ed.) Citation

Geer, D. E. (2006). Playing for keeps. ACM queue : architecting tomorrow's computing..

Chicago Style (17th ed.) Citation

Geer, Daniel E. "Playing for Keeps." ACM Queue : Architecting Tomorrow's Computing. 2006.

MLA (9th ed.) Citation

Geer, Daniel E. "Playing for Keeps." ACM Queue : Architecting Tomorrow's Computing., 2006.

Warning: These citations may not always be 100% accurate.