Cita APA (7a ed.)

Thomas, T. M. A., & Stoddard, D. C. (2012). Network security first-step (2nd ed.). Cisco Press.

Cita Chicago Style (17a ed.)

Thomas, Thomas M Author, y Donald Contributor Stoddard. Network Security First-step. 2nd ed. [Place of publication not identified]: Cisco Press, 2012.

Cita MLA (9a ed.)

Thomas, Thomas M Author, y Donald Contributor Stoddard. Network Security First-step. 2nd ed. Cisco Press, 2012.