Michael Nordberg · Michael Nordfelt
| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| Hypericum and Depression | 978-0-931580-36-9 (0-931580-36-6) | 1997 | Peter McWilliams · Harold H. Bloomfield |
| Hypericum and Depression Can Depression Be | 978-0-931580-38-3 (0-931580-38-2) | 1996 | Harold H. Bloomfield · Peter McWilliams |