Brown, N. M. (2015). Ivory Vikings: The mystery of the most famous chessmen in the world and the woman who made them (First edition.). St. Martin's Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Brown, Nancy Marie. Ivory Vikings: The Mystery of the Most Famous Chessmen in the World and the Woman Who Made Them. First edition. New York: St. Martin's Press, 2015.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Brown, Nancy Marie. Ivory Vikings: The Mystery of the Most Famous Chessmen in the World and the Woman Who Made Them. First edition. St. Martin's Press, 2015.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.