APA (7th ed.) Citation

Popper, K. R. (1966). The open society and its enemies / by K.R. Popper (5th ed.). Routledge and Kegan Paul.

Chicago Style (17th ed.) Citation

Popper, Karl R. The Open Society and Its Enemies / by K.R. Popper. 5th ed. Routledge and Kegan Paul, 1966.

MLA (9th ed.) Citation

Popper, Karl R. The Open Society and Its Enemies / by K.R. Popper. 5th ed. Routledge and Kegan Paul, 1966.

Warning: These citations may not always be 100% accurate.