Blake, R., & Nicolls, C. S. (1995). The Dictionary of National Biography: Twenthieth Century: Ed. by Lord [Robert] Blake and C[hristine] S[tephanie] Nicholls (Repr. (with corr.), 3. impr.). Oxford Univ. Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Blake, Robert, و Christine Stephanie Nicolls. The Dictionary of National Biography: Twenthieth Century: Ed. by Lord [Robert] Blake and C[hristine] S[tephanie] Nicholls. Repr. (with corr.), 3. impr. Oxford [u.a.]: Oxford Univ. Press, 1995.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Blake, Robert, و Christine Stephanie Nicolls. The Dictionary of National Biography: Twenthieth Century: Ed. by Lord [Robert] Blake and C[hristine] S[tephanie] Nicholls. Repr. (with corr.), 3. impr. Oxford Univ. Press, 1995.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.