| title | ISBN-13 (ISBN-10) | year of publica- tion | other author(s) |
|---|---|---|---|
| The Aqua Group Guide to Procurement, Tendering and Contract Administration | 978-1-118-34654-9 (1-118-34654-8) | 2016 | Mark Hackett |
| The Aqua Group Guide to Procurement, Tendering and Contract Administration | 978-1-4051-3198-8 (1-4051-3198-5) | 2007 | Mark Hackett · Ian Robinson |