| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Undercover Exercise: Turn Everyday Activities into Fitness and Fun | 978-0-13-935446-5 (0-13-935446-8) | 1985 |
| Undercover exercise: Turn everyday activities into fitness and fun | 978-0-13-935453-3 (0-13-935453-0) | 1984 |
M.E · Marta Ertman · Martha Ertman · Murad Erdemir · Murat Erdin