APA (7th ed.) Citation

Langer, M. A. (2010). Mac OS X 10.6 Snow Leopard (1st edition.). Peachpit.

Chicago Style (17th ed.) Citation

Langer, Maria Author. Mac OS X 10.6 Snow Leopard. 1st edition. [Place of publication not identified]: Peachpit, 2010.

MLA (9th ed.) Citation

Langer, Maria Author. Mac OS X 10.6 Snow Leopard. 1st edition. Peachpit, 2010.