Cita APA (7a ed.)

Emmons, R. A. (2007). Thanks!: How the new science of gratitude can make you happier. Houghton Mifflin.

Cita Chicago Style (17a ed.)

Emmons, Robert A. Thanks!: How the New Science of Gratitude Can Make You Happier. Boston [etc.]: Houghton Mifflin, 2007.

Cita MLA (9a ed.)

Emmons, Robert A. Thanks!: How the New Science of Gratitude Can Make You Happier. Houghton Mifflin, 2007.