APA Style

Seligman, M, E, P. (2002). Authentic Happiness: Using the New Positive Psychology to Your Potential for Lasting Fulfillment . New York: Free Press.

MLA Style

Seligman, Martin, E., P.. "Authentic Happiness: Using the New Positive Psychology to Your Potential for Lasting Fulfillment". New York: Free Press, 2002. Books.