APA (7th ed.) Citation

Mill, J. S., & Winch, D. (1970). Principles of Political Economy. Penguin Books.

Chicago Style (17th ed.) Citation

Mill, John Stuart, and Donald Winch. Principles of Political Economy. Harmondsworth: Penguin Books, 1970.

MLA (9th ed.) Citation

Mill, John Stuart, and Donald Winch. Principles of Political Economy. Penguin Books, 1970.