APA (7th ed.) Citation

Popper, K. R. (1992). In search of a better world: Lectures and essays from thirty years. Routledge.

Chicago Style (17th ed.) Citation

Popper, Karl Raimund. In Search of a Better World: Lectures and Essays from Thirty Years. London [etc.]: Routledge, 1992.

MLA (9th ed.) Citation

Popper, Karl Raimund. In Search of a Better World: Lectures and Essays from Thirty Years. Routledge, 1992.