APA استشهاد

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

استشهاد بنمط شيكاغو

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

MLA استشهاد

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