G. K. · George K. · George M. Kapalka · Kapalka George
| title | media type | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|---|
| Counseling Boys and Men with ADHD | Hardcover | 978-1-138-41535-5 (1-138-41535-9) | 2017 |
| Counseling Boys and Men with ADHD | Paperback | 978-0-415-99344-9 (0-415-99344-X) | 2009 |
| Niegrzeczne dzieci | Taschenbuch | 978-83-7489-380-0 (83-7489-380-X) | 2012 |