POPPER, K. R. (1992). Conjectures and refutations: The growth of scientific knowledge.-- ed.5. Routledge and Kegan Paul.
Lua i Stíl Chicago (17ú heag.)POPPER, Karl R. Conjectures and Refutations: The Growth of Scientific Knowledge.-- Ed.5. New York: Routledge and Kegan Paul, 1992.
Lua MLA (9ú heag.)POPPER, Karl R. Conjectures and Refutations: The Growth of Scientific Knowledge.-- Ed.5. Routledge and Kegan Paul, 1992.
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