APA (7th ed.) Citation

Mill, J. S., & Himmelfarb, G. (1982). On liberty. Penguin Books.

Chicago Style (17th ed.) Citation

Mill, John Stuart, and Gertrude Himmelfarb. On Liberty. Harmondsworth: Penguin Books, 1982.

MLA (9th ed.) Citation

Mill, John Stuart, and Gertrude Himmelfarb. On Liberty. Penguin Books, 1982.