- Havighurst, R.J.; Neugarten, B.L.; Tobin, S.S.
- Disengagement, Personality and Life Satisfaction in Later Years.
- Hansen, D.;Ed.: "Age with a Future", Munksgaard, 1964, Copenhagen, Denmark, 419 - 425
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no valid measure of happiness used.