Ricketts, P. (2010). High-ranking widows in medieval Iceland and Yorkshire: Property, pwer, marriage ad identity in the twelfth and thirteenth centuries. Brill.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ricketts, Philadelphia. High-ranking Widows in Medieval Iceland and Yorkshire: Property, Pwer, Marriage Ad Identity in the Twelfth and Thirteenth Centuries. Leiden: Brill, 2010.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Ricketts, Philadelphia. High-ranking Widows in Medieval Iceland and Yorkshire: Property, Pwer, Marriage Ad Identity in the Twelfth and Thirteenth Centuries. Brill, 2010.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.