M P · M. T. · Michael O'Toole · Michael P. O. · Michael T · O'Toole
| title | ISBN-13 (ISBN-10) | year of publica- tion |
|---|---|---|
| Payroll Practice Fundamentals | 978-1-930471-51-1 (1-930471-51-3) | 2004 |
| The Payroll Source | 978-1-934951-12-5 (1-934951-12-9) | 2009 |
| The Payroll Source | 978-1-930471-04-7 (1-930471-04-1) | 2000 |