| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Developing Teaching Style in Adult Education | 978-0-7879-0013-7 (0-7879-0013-3) | 1994 | Emmalou Norland |
| Free-Choice Learning and the Environment | 978-0-7591-1123-3 (0-7591-1123-5) | 2009 | John H. Falk · Susan Foutz |