Cita APA (7a ed.)

Popper, K. R. (1974). Objective knowledge: An evolutionary approach (Repr.). Clarendon.

Cita Chicago Style (17a ed.)

Popper, Karl Raimund. Objective Knowledge: An Evolutionary Approach. Repr. Oxford: Clarendon, 1974.

Cita MLA (9a ed.)

Popper, Karl Raimund. Objective Knowledge: An Evolutionary Approach. Repr. Clarendon, 1974.