| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| People at Work | 978-0-273-01316-7 | 1980 | J. Parker |
| People at Work: Tchrs' | 978-0-273-01340-2 | 1980 | " |
| Thank You for Calling: Tchrs': Telephone and Reception Skills | 978-0-273-01824-7 | 1983 | " |
| Thank You for Calling: Telephone and Reception Skills | 978-0-273-01823-0 | 1983 | " |