J.B. · James B. · James Beckerman M.D. · M.D. James Beckerman M.D.
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Dieta elastyczna | 978-83-7778-153-1 (83-7778-153-0) | 2012 |
| The Flex Diet: Design-Your-Own Weight Loss Plan | 978-1-4391-5569-1 (1-4391-5569-0) | 2010 |