- Chown, S.M.
- Morale, Careers and Personal Potentials.
- Birren, J.E.;Schaie, K.W., Eds.: "Handbook of the Psychology of Aging", Van Nostrand, 1977, New York, USA
- English (Australia, Canada, UK, USA)
Eligible for inclusion in findings archive
- No, no new data on present happiness.