APA (7th ed.) Citation

Popper, K. R. (1972). Objective knowledge : an evolutionary approach / Karl R. Popper: An evolutionary approach. Clarendon P..

Chicago Style (17th ed.) Citation

Popper, Karl R. Objective Knowledge : An Evolutionary Approach / Karl R. Popper: An Evolutionary Approach. Oxford: Clarendon P., 1972.

MLA (9th ed.) Citation

Popper, Karl R. Objective Knowledge : An Evolutionary Approach / Karl R. Popper: An Evolutionary Approach. Clarendon P., 1972.

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