APA (7th ed.) Citation

Safari Tech Books Online, Garfinkel, S. A., & Spafford, G. C. (1997). Web security & commerce. O'Reilly.

Chicago Style (17th ed.) Citation

Safari Tech Books Online, Simson Author Garfinkel, and Gene Contributor Spafford. Web Security & Commerce. [Place of publication not identified]: O'Reilly, 1997.

MLA (9th ed.) Citation

Safari Tech Books Online, et al. Web Security & Commerce. O'Reilly, 1997.