APA (7th ed.) Citation

Popper, K. R. (1962). The open society and its enemies (4th ed., rev.). Routledge & Kegan Paul.

Chicago Style (17th ed.) Citation

Popper, Karl Raimund. The Open Society and Its Enemies. 4th ed., rev. London: Routledge & Kegan Paul, 1962.

MLA (9th ed.) Citation

Popper, Karl Raimund. The Open Society and Its Enemies. 4th ed., rev. Routledge & Kegan Paul, 1962.