Cita APA (7a ed.)

Santos, O., & Stuppi, J. (2015). CCNA security 210-260 official cert guide (1st edition.). Cisco Press.

Cita Chicago Style (17a ed.)

Santos, Omar, y John Stuppi. CCNA Security 210-260 Official Cert Guide. 1st edition. Indianapolis, IN: Cisco Press, 2015.

Cita MLA (9a ed.)

Santos, Omar, y John Stuppi. CCNA Security 210-260 Official Cert Guide. 1st edition. Cisco Press, 2015.