| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2012 | 978-0-9572726-0-6 | John P Heap · Mike Dillon | Measuring and Improving Social, Environmental & Economic Productivity: Getting It Done: Volume 1 |
| 2017 | 978-0-9572726-7-5 | John P. Heap · Remi Dairo | Improving Organizational Productivity: Defining Philosophy, Product, Process and |