Cita APA (7a ed.)

Barnard, D. S. P. (1966). One hundred braintwisters: A second book of puzzles and problems. Faber.

Cita Chicago Style (17a ed.)

Barnard, Douglas St. Paul. One Hundred Braintwisters: A Second Book of Puzzles and Problems. London: Faber, 1966.

Cita MLA (9a ed.)

Barnard, Douglas St. Paul. One Hundred Braintwisters: A Second Book of Puzzles and Problems. Faber, 1966.