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.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Hockenberry, Tom, و 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.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Hockenberry, Tom, و 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.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.