APA引文

Doyle, A. (2021). Free speech: And why it matters. Constable.

芝加哥风格引文

Doyle, Andrew. Free Speech: And Why It Matters. London: Constable, 2021.

MLA引文

Doyle, Andrew. Free Speech: And Why It Matters. Constable, 2021.

警告：这些引文格式不一定是100％准确.