| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Person-centred Communication: Theory and Practice | 978-0-19-578687-3 (0-19-578687-4) | 2003 | Dries Du Toit · Hanka Grobler |
| Person Centred Facilitation: Process, Theory & Practice 3e | 978-0-19-598636-5 (0-19-598636-9) | 2009 | Hanka Grobler · Dries du Toit |