APA (7th ed.) Citation

Proffitt, B., & Von Hagen, W. (2002). Mac OS X power user's guide. Premier Press.

Chicago Style (17th ed.) Citation

Proffitt, Brian, and William Von Hagen. Mac OS X Power User's Guide. [Florence, Ky.]: Premier Press, 2002.

MLA (9th ed.) Citation

Proffitt, Brian, and William Von Hagen. Mac OS X Power User's Guide. Premier Press, 2002.