Dyfyniad APA

Popper, K. R. (1972). The logic of scientific discovery (6th impression revised.). Hutchinson.

Dyfyniad Arddull Chicago

Popper, Karl R. The Logic of Scientific Discovery. 6th impression revised. London: Hutchinson, 1972.

Dyfyniad MLA

Popper, Karl R. The Logic of Scientific Discovery. 6th impression revised. Hutchinson, 1972.

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