APA (7th ed.) Citation

Garfinkel, S., Schwartz, A., & Spafford, G. (2003). Practical UNIX and Internet security (3rd ed.). O'Reilly.

Chicago Style (17th ed.) Citation

Garfinkel, Simson, Alan Schwartz, and Gene Spafford. Practical UNIX and Internet Security. 3rd ed. Beijing ; Sebastopol, California: O'Reilly, 2003.

MLA (9th ed.) Citation

Garfinkel, Simson, et al. Practical UNIX and Internet Security. 3rd ed. O'Reilly, 2003.