(1998). Ursus: An official publication of the International Association for Bear Research and Management. International Association for Bear Research and Management.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ursus: An Official Publication of the International Association for Bear Research and Management. [United States]: International Association for Bear Research and Management, 1998.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ursus: An Official Publication of the International Association for Bear Research and Management. International Association for Bear Research and Management, 1998.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.