Cioara, J. (2007). Authorized self-study guide: Cisco IP telephony (CIPT) (Second edition.). Cisco Press.
Chicago-referens (17:e uppl.)Cioara, Jeremy. Authorized Self-study Guide: Cisco IP Telephony (CIPT). Second edition. Indiana: Cisco Press, 2007.
MLA-referens (8:e uppl.)Cioara, Jeremy. Authorized Self-study Guide: Cisco IP Telephony (CIPT). Second edition. Cisco Press, 2007.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.