APA (7th ed.) Citation

Garfinkel, S., & Spafford, E. (1991). Practical UNIX security. O'Reilly.

Chicago Style (17th ed.) Citation

Garfinkel, Simson, and Eugene Spafford. Practical UNIX Security. Sebastopol, California: O'Reilly, 1991.

MLA (9th ed.) Citation

Garfinkel, Simson, and Eugene Spafford. Practical UNIX Security. O'Reilly, 1991.

Warning: These citations may not always be 100% accurate.