APA (7th ed.) Citation

Gregg, M. A. (2006). Certified ethical hacker (1st edition.). Que Certification.

Chicago Style (17th ed.) Citation

Gregg, Michael Author. Certified Ethical Hacker. 1st edition. [Place of publication not identified]: Que Certification, 2006.

MLA (9th ed.) Citation

Gregg, Michael Author. Certified Ethical Hacker. 1st edition. Que Certification, 2006.

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