Facts on File · Harvard University Press
| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| Captain Kidd and the War against the Pirates | 978-0-674-09502-1 (0-674-09502-2) | 1989 |
| Historical Atlas of the Renaissance | 978-0-8160-5731-3 (0-8160-5731-1) | 2004 |
R.R. · R. Ritchie · Robert C. Ritchie · Robert L. Ritchie · Robert R. · Robert Welles Ritchie