| title | ISBN-13 | year of publication |
|---|---|---|
| Underground Railroad in Delaware, Maryland, and West Virginia | 978-0-8117-3143-0 | 2004 |
| Underground Railroad in New York and New Jersey | 978-0-8117-3258-1 | 2006 |
| Underground Railroad in Pennsylvania, 2nd Edition | 978-0-8117-3518-6 | 2008 |
| Underground Railroad in Pennsylvania | 978-0-8117-1629-1 | 2001 |
J. S. · W.J. · W.S. · William J. · William S. · William Switala