APA (7th ed.) Citation

Popper, K. R. (1963). The open society and its enemies ([4th ed., rev.].). Harper & Row.

Chicago Style (17th ed.) Citation

Popper, Karl R. The Open Society and Its Enemies. [4th ed., rev.]. New York: Harper & Row, 1963.

MLA (9th ed.) Citation

Popper, Karl R. The Open Society and Its Enemies. [4th ed., rev.]. Harper & Row, 1963.