Universidad Tecnológica de El Salvador

Martin E.P. Seligman

9 Book

Learned Optimism
How to Change Your Mind and Your Life
Martin E.P. Seligman
Vintage Books, 2006
9 Book

Authentic Happiness
Using the New Positive Psychology to Realize Your Potential for Lasting Fulfillment
Martin E.P. Seligman
Atria Books, 2002