1. International Organization for Standardization. About ISO. Available from: http://www.iso.org/iso/home/about.htm
2. International Electrotechnical Commission. Welcome to the IEC. Available from: http://www.iec.ch/about/?ref=menu
3. International Telecommunication Union. Overview. Available from: http://www.itu.int/en/about/Pages/default.aspx
4. International Organization for Standardization. How does ISO develop standards? Available from: http://www.iso.org/iso/home/standards_development.htm
5. International Organization for Standardization, International Electrotechnical Commission. ISO/IEC directives. Part 1: Consolidated ISO supplement—procedures specific to ISO. 5th ed. Geneva: ISO Central Secretariat, IEC Central Office; 2014.