APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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