Nicolls, C. S., & Thomas, K. (1996). The Dictionary of National Biography: Twenthieth Century: Ed. by C[hristine] S[tephanie] Nicholls. Consultant ed.: Keith Thomas (1. publ.). Oxford Univ. Press.

Nicolls, Christine Stephanie, and Keith Thomas. The Dictionary of National Biography: Twenthieth Century: Ed. by C[hristine] S[tephanie] Nicholls. Consultant Ed.: Keith Thomas. 1. publ. Oxford [u.a.]: Oxford Univ. Press, 1996.

Nicolls, Christine Stephanie, and Keith Thomas. The Dictionary of National Biography: Twenthieth Century: Ed. by C[hristine] S[tephanie] Nicholls. Consultant Ed.: Keith Thomas. 1. publ. Oxford Univ. Press, 1996.