Bronstein, Laura R., and Susan E. Mason. “A Serial Focus Group Model for Understanding Experiences of Older Adult Volunteers and Non-Profit Agency Managers”. Groupwork 23, no. 2 (August 21, 2013): 67-87. Accessed April 27, 2024. https://journals.whitingbirch.net/index.php/GPWK/article/view/761.