APA (7th ed.) Citation

Systems, -. C. Cisco 2500 Series Access Server User Guide. Cisco Press.

Chicago Style (17th ed.) Citation

Systems, ---- Cisco. Cisco 2500 Series Access Server User Guide. Cisco Press.

MLA (8th ed.) Citation

Systems, ---- Cisco. Cisco 2500 Series Access Server User Guide. Cisco Press.

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