Cita APA (7th ed.)

(2020). Bicycle or unicycle?: A collection of intriguing mathematical puzzles / Daniel J. Velleman, Stan Wagon.

Cita Chicago (17th ed.)

Bicycle or Unicycle?: A Collection of Intriguing Mathematical Puzzles / Daniel J. Velleman, Stan Wagon. 2020.

Cita MLA (9th ed.)

Bicycle or Unicycle?: A Collection of Intriguing Mathematical Puzzles / Daniel J. Velleman, Stan Wagon. 2020.