APA (7th ed.) Citation

Safari Tech Books Online & Quigley, E. A. (2004). UNIX(R) Shells by Example (4th ed.). Prentice Hall PTR.

Chicago Style (17th ed.) Citation

Safari Tech Books Online and Ellie Author Quigley. UNIX(R) Shells by Example. 4th ed. [Place of publication not identified]: Prentice Hall PTR, 2004.

MLA (9th ed.) Citation

Safari Tech Books Online and Ellie Author Quigley. UNIX(R) Shells by Example. 4th ed. Prentice Hall PTR, 2004.