APA (7th ed.) Citation

Popper, K. R., & Popper, K. (2003). The open society and its enemies. Routledge.

Chicago Style (17th ed.) Citation

Popper, Karl Raimund, and Karl Popper. The Open Society and Its Enemies. Routledge, 2003.

MLA (9th ed.) Citation

Popper, Karl Raimund, and Karl Popper. The Open Society and Its Enemies. Routledge, 2003.

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