3Michelle Goulboume Canadian Centre for Philanthropy. As- signing economic value to volunteer activity: eight tools for efficient program management.
4Mook, Laurie ( 2007 ) " Measuring the value of volunteer work". Report prepared for Lorna Bailie, Director, Special Surveys Division, Statistics Canada. July 12, 2007.
5Toppe, Christopher (2007). "What is volunteering and how can it be measured" Paper prepared and presented at the JHU/UNECE Workshop on Volunteer Measurement, Gene- va, 2007.
6Corporation for National and Community Service. "Research Brief: Volunteering in America Research Highlights", 2013.
7Latest figure from 2014 Bureau of Labor Statistics data, in- dexed by Independent Sector in March, 2015.