| title | media type | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|---|
| Commerce and Community: Ecologies of Social Cooperation | Hardcover | 978-0-415-81009-8 (0-415-81009-4) | 2014 | Robert F. Garnett Jr. · Paul Lewis |
| Commerce and Community: Ecologies of Social Cooperation | Paperback | 978-0-415-81010-4 (0-415-81010-8) | 2014 | Robert F. Garnett Jr. · Paul Lewis |
| Liberty & Learning: Milton Friedman's Voucher Idea at Fifty | Hardcover | 978-1-930865-93-8 (1-930865-93-7) | 2006 | Robert Enlow |