APA استشهاد

Popper,Karl R. (1959). The logic of scientific discovery. Hutchinson.

استشهاد بنمط شيكاغو

Popper,Karl R. The Logic of Scientific Discovery. London: Hutchinson, 1959.

MLA استشهاد

Popper,Karl R. The Logic of Scientific Discovery. Hutchinson, 1959.