APA ציטוט

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

Chicago Edition Citation

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

ציטוט MLA

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