APA

Vaillant G. E., . (2003). Aging Well. Surprising guideposts to a happier life from the landmark harvard study of adult development. New York: Hachette Book Group.

Chicago

Vaillant George E, . 2003. Aging Well. Surprising guideposts to a happier life from the landmark harvard study of adult development. New York: Hachette Book Group.

Harvard

Vaillant G. E., . (2003). Aging Well. Surprising guideposts to a happier life from the landmark harvard study of adult development. New York: Hachette Book Group.

MLA

Vaillant George E, . Aging Well. Surprising guideposts to a happier life from the landmark harvard study of adult development. New York: Hachette Book Group. 2003.