Cita APA (7a ed.)

Gardner, M., & Carroll, L. (1996). The universe in a handkerchief: Lewis Carroll's mathematical recreations, games, puzzles, and word play. Copernicus.

Cita Chicago Style (17a ed.)

Gardner, Martin, y Lewis Carroll. The Universe in a Handkerchief: Lewis Carroll's Mathematical Recreations, Games, Puzzles, and Word Play. New York: Copernicus, 1996.

Cita MLA (9a ed.)

Gardner, Martin, y Lewis Carroll. The Universe in a Handkerchief: Lewis Carroll's Mathematical Recreations, Games, Puzzles, and Word Play. Copernicus, 1996.