Ehring, D. (1997). Causation and persistence: A theory of causation. Oxford University Press.
芝加哥风格引文Ehring, Douglas. Causation and Persistence: A Theory of Causation. New York ; Oxford, [England]: Oxford University Press, 1997.
MLA引文Ehring, Douglas. Causation and Persistence: A Theory of Causation. Oxford University Press, 1997.
警告：这些引文格式不一定是100％准确.