APA (7th ed.) Citation

Safari Tech Books Online, Adams, C. A., & Lloyd, S. C. (1999). Understanding the Public-Key Infrastructure: Concepts, Standards and Deployment Considerations (1st edition.). Sams.

Chicago Style (17th ed.) Citation

Safari Tech Books Online, Carlisle Author Adams, and Steve Contributor Lloyd. Understanding the Public-Key Infrastructure: Concepts, Standards and Deployment Considerations. 1st edition. [Place of publication not identified]: Sams, 1999.

MLA (9th ed.) Citation

Safari Tech Books Online, et al. Understanding the Public-Key Infrastructure: Concepts, Standards and Deployment Considerations. 1st edition. Sams, 1999.