| year of publication | ISBN | author(s) | title |
|---|---|---|---|
| 2007 | 978-0-9701162-3-9 | David Schumacher · Ph.D. | "Buy & Hold 7 Steps to a Real Estate Fortune"- New 2007 Edition |
| '' | 978-0-9701162-4-6 | David Schumacher · PH. D. | "Buy & Hold 7 Steps to a Real Estate Fortune"- New 2007 |