Cita APA (7th ed.)

Guthrie, J., & Preston, T. (2005). Improve your brain power: 400 games, puzzles, and teasers to unlock your mind. Reader's Digest.

Cita Chicago (17th ed.)

Guthrie, Jackie, i Tim Preston. Improve Your Brain Power: 400 Games, Puzzles, and Teasers to Unlock Your Mind. Pleasantville, N.Y: Reader's Digest, 2005.

Cita MLA (9th ed.)

Guthrie, Jackie, i Tim Preston. Improve Your Brain Power: 400 Games, Puzzles, and Teasers to Unlock Your Mind. Reader's Digest, 2005.