Warman's Hummel Field Guide: Values and Identification (Warman's Field Guides)
The Official M.I. Hummel Price Guide: Figurines & Plates (Hummel Figurines and Plates)
M.I. Hummel: The Golden Anniversary Album
No. 1 Price Guide to M.I.Hummel Figurines, Plates, Miniatures, & More (Mi Hummel Figurines, Plates, Miniatures & More 10th Ed. (Mi Hummel Figurines, Plates, Miniatures & More Price Guide)
The No. 1 Price Guide to M.I. Hummel: Figurines, Plates, More
Luckey's Hummel Figurines and Plates: Identification and Price Guide (12th Edition)
The Goebel Collector's Guide: Volume One