APA (7th ed.) Citation

Sunstein, C. R. (1993). Democracy and the problem of free speech. The Free Press.

Chicago Style (17th ed.) Citation

Sunstein, Cass R. Democracy and the Problem of Free Speech. New York: The Free Press, 1993.

MLA (9th ed.) Citation

Sunstein, Cass R. Democracy and the Problem of Free Speech. The Free Press, 1993.