APA (7th ed.) Citation
Proffitt, B. (2008). Introducing Ubuntu: Desktop Linux. Thomson Course Technology.
Chicago Style (17th ed.) Citation
Proffitt, Brian. Introducing Ubuntu: Desktop Linux. Boston, MA: Thomson Course Technology, 2008.
MLA (9th ed.) Citation
Proffitt, Brian. Introducing Ubuntu: Desktop Linux. Thomson Course Technology, 2008.
Warning: These citations may not always be 100% accurate.