Engebretson, P., & Kennedy, D. (2013). The basics of hacking and penetration testing: Ethical hacking and penetration testing made easy (2nd ed.). Syngress, an imprint of Elsevier.

Engebretson, Pat, and David Kennedy. The Basics of Hacking and Penetration Testing: Ethical Hacking and Penetration Testing Made Easy. 2nd ed. Amsterdam: Syngress, an imprint of Elsevier, 2013.

Engebretson, Pat, and David Kennedy. The Basics of Hacking and Penetration Testing: Ethical Hacking and Penetration Testing Made Easy. 2nd ed. Syngress, an imprint of Elsevier, 2013.