| title | ISBN-13 | year of publica- tion | other author(s) |
|---|---|---|---|
| Health & Safety at Work Essentials 2nd Edition | 978-1-904053-31-6 | 2003 | Mary Duncan · Penny Heighway |
| Health & Safety at Work Essentials 3rd edition | 978-1-904053-52-1 | 2004 | Mary Duncan · Penny Heighway |
| Health and Safety at Work Essentials | 978-1-904053-77-4 | 2005 | Mary Duncan · Penny Heighway |
| Health and Safety at Work Essentials: The One-stop Guide for Anyone Responsible for Health and Safety Issues in the Workplace | 978-1-905261-24-6 | 2006 | Mary Duncan · Penny Heighway |