Cita APA (7a ed.)

O'Hear, A. (1995). Karl Popper: Philosophy and problems. University Press.

Cita Chicago Style (17a ed.)

O'Hear, Anthony. Karl Popper: Philosophy and Problems. Cambridge: University Press, 1995.

Cita MLA (9a ed.)

O'Hear, Anthony. Karl Popper: Philosophy and Problems. University Press, 1995.