Cornell University Library · Nabu Press
| title | ISBN-13 | year of publication |
|---|---|---|
| Outlines of Political Science: -1901 | 978-1-112-31974-7 | 2009 |
| Outlines of Social Economics: -1900 | 978-1-112-23360-9 | 2009 |
| Principles of Social Economics: Inductively Considered and Practically Applied, with Criticisms On Correct Theories | 978-1-143-05962-9 | 2010 |
| Principles of Social Economics, Inductively Considered and Practically Applied, With Criticisms on Current Theories: -1897 | 978-1-112-26988-2 | 2009 |