Ardelt, M. 2003. Empirical assessment of a three-dimensional wisdom scale. Research on Aging, 25, 3, 275–324.
Arlin, P. K. (1990). Wisdom: the art of problem-finding. In Sternberg, R. J. (ed.) Wisdom: Its Nature, Origins and Developments. Cambridge University Press, Cambridge, 230–43
Assmann, A. 1994. Wholesome knowledge: concepts of wisdom in a historical and cross-cultural perspective. In Featherman, D. L., Lerner, R. M. and Perlmutter, M. (eds) Life-Span Development and Behavior. Erlbaum, Hillsdale, New Jersey, 188–224.
Atchley, R. C. (1993). Spiritual development and wisdom: A vedantic perspective. In R. Kastenbaum (Ed.),Encyclopedia of adult development. Phoenix, AZ: Oryz Press.
Le, T. N. (2008). Age differences in spirituality, mystical experiences and wisdom. Ageing and Society, 28(3), 383-411.