O'Beirne, T. h. (1965). Puzzles and paradoxes. Oxford University.
Chicago Style aipamenaO'Beirne, T h. Puzzles and Paradoxes. London: Oxford University, 1965.
MLA aipamenaO'Beirne, T h. Puzzles and Paradoxes. Oxford University, 1965.
Kontuz: berrikusi erreferentzia hauek erabili aurretik.