APA (7th ed.) Citation

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

Chicago Style (17th ed.) Citation

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

MLA (9th ed.) Citation

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

Warning: These citations may not always be 100% accurate.