Cita APA (7th ed.)

Popper, K. (1994). All Life in Problem Solving. Routledge.

Cita Chicago (17th ed.)

Popper, Karl. All Life in Problem Solving. London: Routledge, 1994.

Cita MLA (9th ed.)

Popper, Karl. All Life in Problem Solving. Routledge, 1994.