APA (7th ed.) Citation

Popper, K. R. (1991). Conjectures and refutations: The growth of scientific knowledge (5., rev. ed., repr.). Routledge.

Chicago Style (17th ed.) Citation

Popper, Karl R. Conjectures and Refutations: The Growth of Scientific Knowledge. 5., rev. ed., repr. London ; New York: Routledge, 1991.

MLA (9th ed.) Citation

Popper, Karl R. Conjectures and Refutations: The Growth of Scientific Knowledge. 5., rev. ed., repr. Routledge, 1991.