APA
Popper K. R., . (1972). The logic of scientific discovery. Hutchinson & co ltd, London: .
Chicago
Popper Karl R, . 1972. The logic of scientific discovery. Hutchinson & co ltd, London: .
Harvard
Popper K. R., . (1972). The logic of scientific discovery. Hutchinson & co ltd, London: .
MLA
Popper Karl R, . The logic of scientific discovery. Hutchinson & co ltd, London: . 1972.