//-->
ROI Marketing : Measuring, Demonstrating, and Improving Value
Fu, Frank Q., (2018)
Making change work : how to create behavioural change in organizations to drive impact and ROI
Weber, Emma, (2016)
Value for money : how to show the value for money for all types of projects and programs in governments, nongovernmental organizations, nonprofits, and businesses
Phillips, Patricia Pulliam, (2019)