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.

Blake, Robert, and 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.

Blake, Robert, and 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.