APA (7th ed.) Citation

Popper, K. R. (1952). The open society and its enemies ((2. ed. <revised>).). Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Popper, Karl R. The Open Society and Its Enemies. (2. ed. <revised>). London: Routledge & Kegan Paul, 1952.

MLA (9th ed.) Citation

Popper, Karl R. The Open Society and Its Enemies. (2. ed. <revised>). Routledge & Kegan Paul, 1952.