APA (7th ed.) Citation

Popper, K. R., & Schilpp, P. A. (1974). The philosophy of Karl Popper. Open Court.

Chicago Style (17th ed.) Citation

Popper, Karl R., and Paul Arthur Schilpp. The Philosophy of Karl Popper. La Salle, Ill.: Open Court, 1974.

MLA (9th ed.) Citation

Popper, Karl R., and Paul Arthur Schilpp. The Philosophy of Karl Popper. Open Court, 1974.