APA (7th ed.) Citation

Popper, K. R. (1973). Objective knowledge: An evolutionary approach. Oxford Clarendon Press.

Chicago Style (17th ed.) Citation

Popper, Karl R. Objective Knowledge: An Evolutionary Approach. Oxford Clarendon Press, 1973.

MLA (9th ed.) Citation

Popper, Karl R. Objective Knowledge: An Evolutionary Approach. Oxford Clarendon Press, 1973.

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