Dyfyniad APA

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

Dyfyniad Arddull Chicago

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

Dyfyniad MLA

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

Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.