G.M. · G. Marshall · Grace L. Marshall · Grace M.
ParkHill Press · Pearson Education
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| 21 Ways to Manage the Stuff that Sucks Up Your Time | 978-1-937944-10-0 (1-937944-10-7) | 2012 |
| Brilliant Productivity | 978-1-292-08340-7 (1-292-08340-9) | 2015 |
| How To Be REALLY Productive: Achieving clarity and getting results in a world where work never ends | 978-1-292-08383-4 (1-292-08383-2) | 2015 |