| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Philadelphia With Children: A Guide to the Delaware Valley Including Lancaster and Hershey | 978-0-940159-62-4 (0-940159-62-7) | 2000 |
| Philadelphia With Children: A Guide to the Delaware Valley Including Lancaster and Hershey | 978-0-940159-37-2 (0-940159-37-6) | 1996 |