APA (7th ed.) Citation

Stewart, E. L. (2009). CCNA security exam cram (1st edition.). Que Certification.

Chicago Style (17th ed.) Citation

Stewart, Eric L. CCNA Security Exam Cram. 1st edition. [Indianapolis, Ind.?]: Que Certification, 2009.

MLA (9th ed.) Citation

Stewart, Eric L. CCNA Security Exam Cram. 1st edition. Que Certification, 2009.

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