Gaya APA

Stuppi, O, S, J. (2015). "Official Cert Guide Learn, Prepare, and Practice for Exam Success: CCNA Security 210-260| . United States: Cisco Press.

Gaya MLA

Stuppi, Omar, Santos;, John. ""Official Cert Guide Learn, Prepare, and Practice for Exam Success: CCNA Security 210-260|". United States: Cisco Press, 2015. book.