| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Park and Recreation Maintenance Management | 978-1-57167-568-2 (1-57167-568-X) | 2007 |
| PMP Exam Master Prep: Learn Faster, Retain More, Pass the PMP Exam, Sixth Edition | 978-0-9963406-5-6 (0-9963406-5-3) | 2018 |
| PMP Exam Prep Flashcards: Success Secrets | 978-0-9963406-8-7 (0-9963406-8-8) | 2019 |