Cita APA (7a ed.)

Popper, K. R. (1968). Conjectures and refutations: The growth of scientific knowledge. Harper & Row.

Cita Chicago Style (17a ed.)

Popper, Karl Raimund. Conjectures and Refutations: The Growth of Scientific Knowledge. New York [etc.]: Harper & Row, 1968.

Cita MLA (9a ed.)

Popper, Karl Raimund. Conjectures and Refutations: The Growth of Scientific Knowledge. Harper & Row, 1968.