APA引文

Foot, P. (1967). Theories of ethics. Oxford U.P..

芝加哥风格引文

Foot, Philippa. Theories of Ethics. London: Oxford U.P., 1967.

MLA引文

Foot, Philippa. Theories of Ethics. Oxford U.P., 1967.

警告：这些引文格式不一定是100％准确.