APA引文

Benn, S. I. (1980). A theory of freedom. Univ. Pr..

芝加哥风格引文

Benn, S.I.(Stanley Isaac). A Theory of Freedom. Cambridge: Univ. Pr., 1980.

MLA引文

Benn, S.I.(Stanley Isaac). A Theory of Freedom. Univ. Pr., 1980.

警告：这些引文格式不一定是100％准确.