APA Style

ISO/IEC, . (2013). ISO/IEC 27033 -- Information technology -- security techniques -- network security -- Part 5: Securing communications across networks using Virtual Private Networks (VPNs) (First edition). Geneva: ISO/IEC.

MLA Style

ISO/IEC, . "ISO/IEC 27033 -- Information technology -- security techniques -- network security -- Part 5: Securing communications across networks using Virtual Private Networks (VPNs)". First edition Geneva: ISO/IEC, 2013. Text.