William Strahan (Firm), Strahan Archive (British Library), British Library, & British Library. (1989). The Strahan archive from the British Library, London. Research Publications.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)William Strahan (Firm), Strahan Archive (British Library), British Library, و British Library. The Strahan Archive from the British Library, London. Reading, England ; Woodbridge, Conn.: Research Publications, 1989.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)William Strahan (Firm), et al. The Strahan Archive from the British Library, London. Research Publications, 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.