| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| International Perspectives on Group Work | 978-1-138-30911-1 (1-138-30911-7) | 2018 | Bogusia Skudrzyk · A. Michael Hutchins |
| International Perspectives on Group Work: Leadership, Practice, Research, and Teaching | 978-1-138-19052-8 (1-138-19052-7) | 2016 | Ana Puig · Bogusia Skudrzyk · A. Michael Hutchins |