La auténtica felicidadDoctor Martin Seligman, the eminent investigator of the human psyche, who a decade ago created the concept of “flexible optimism”, introduces a new and revolutionary scientific strand--positive psychology. |
La auténtica felicidadDoctor Martin Seligman, the eminent investigator of the human psyche, who a decade ago created the concept of “flexible optimism”, introduces a new and revolutionary scientific strand--positive psychology. |