| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Braided Threads: A Historical Overview of the American Nonprofit Sector | 978-0-8153-9391-7 (0-8153-9391-1) | 2018 |
| The Nonprofit Outcomes Toolbox: A Complete Guide to Program Effectiveness, Performance Measurement, and Results | 978-1-118-00450-0 (1-118-00450-7) | 2011 |
M P · R. M. · R. P. · R. Penna · Robert M. · Robert P. · Robert Penna