DIN ISO 21504 E:2016 Draft Document - Project, programme and portfolio management - Guidance on portfolio management (ISO 21504:2015); Text in German and English
2017DIN ISO 21504:2017 Project, programme and portfolio management - Guidance on portfolio management (ISO 21504:2015)
1970DIN ISO 21504 E:2016-10 Project, programme and portfolio management - Guidance on portfolio management
2016DIN ISO 21504 E:2016 Draft Document - Project, programme and portfolio management - Guidance on portfolio management (ISO 21504:2015); Text in German and English