| title | ISBN-13 (ISBN-10) | year of publication |
|---|---|---|
| The Official M.I. Hummel Price Guide: Figurines & Plates | 978-1-4402-3713-3 (1-4402-3713-1) | 2013 |
| Warman's Hummel Field Guide: Values and Identification | 978-1-4402-2997-8 (1-4402-2997-X) | 2012 |
| Warman's Hummel Field Guide: Values and Identification. | 978-1-4402-2998-5 (1-4402-2998-8) | 2012 |
A. R. · A. V. · H.A. · Heidi R. · Heidi Von Recklinghausen