Legg, L. G. W., & Williams, E. T. (1959). The Dictionary of National Biography: Twenthieth Century: Ed. by L[eopold] G[eorge] Wickham Legg and E[dgar] T[revor] Williams (Repr.). Oxford Univ. Press.
Chicago Style (17th ed.) CitationLegg, Leopold George Wickham, and Edgar Trevor Williams. The Dictionary of National Biography: Twenthieth Century: Ed. by L[eopold] G[eorge] Wickham Legg and E[dgar] T[revor] Williams. Repr. Oxford: Oxford Univ. Press, 1959.
MLA (8th ed.) CitationLegg, Leopold George Wickham, and Edgar Trevor Williams. The Dictionary of National Biography: Twenthieth Century: Ed. by L[eopold] G[eorge] Wickham Legg and E[dgar] T[revor] Williams. Repr. Oxford Univ. Press, 1959.
Warning: These citations may not always be 100% accurate.