APA (7th ed.) Citation

Gelb, M., & Title. (2012). Brain power: Improve your mind as you age. New World Library.

Chicago Style (17th ed.) Citation

Gelb, Michael, and Title. Brain Power: Improve Your Mind as You Age. California: New World Library, 2012.

MLA (8th ed.) Citation

Gelb, Michael, and Title. Brain Power: Improve Your Mind as You Age. New World Library, 2012.