Williams, E. T., & Nicolls, C. S. (1981). The Dictionary of National Biography: Twenthieth Century: Ed. by E[dgar] Trevor] Williams and C[hristine] S[tephanie] Nicholls. Oxford Univ. Press.
Chicago-Zitierstil (17. Ausg.)Williams, Edgar Trevor, und Christine Stephanie Nicolls. The Dictionary of National Biography: Twenthieth Century: Ed. by E[dgar] Trevor] Williams and C[hristine] S[tephanie] Nicholls. Oxford: Oxford Univ. Press, 1981.
MLA-Zitierstil (8. Ausg.)Williams, Edgar Trevor, und Christine Stephanie Nicolls. The Dictionary of National Biography: Twenthieth Century: Ed. by E[dgar] Trevor] Williams and C[hristine] S[tephanie] Nicholls. Oxford Univ. Press, 1981.
警告：這些引文格式不一定是100％准確.