Hockenberry, T., & Hockenberry, D. (1989). Collectible German Animals Value Guide, 1948-1968: An Identification and Price Guide to Steiff, Schuco, Hermann, and Other German Companies. Hobby House Press, Inc.
Chicago-referens (17:e uppl.)Hockenberry, Tom, och Dee Hockenberry. Collectible German Animals Value Guide, 1948-1968: An Identification and Price Guide to Steiff, Schuco, Hermann, and Other German Companies. Cumberland/ Marayland: Hobby House Press, Inc, 1989.
MLA-referens (8:e uppl.)Hockenberry, Tom, och Dee Hockenberry. Collectible German Animals Value Guide, 1948-1968: An Identification and Price Guide to Steiff, Schuco, Hermann, and Other German Companies. Hobby House Press, Inc, 1989.
Varning: dessa hänvisningar är inte alltid fullständigt riktiga.