1. Baltes, P. B., & Smith, J. (1990). Toward a psychology of wisdom and its ontogenesis. In R. J. Sternberg (Ed.), Wisdom: Its nature, origins, and development (pp. 87-120). Cambridge, England: Cambridge University Press.
2. Berry, D. S., & McArthur, L. Z. (1988). The impact of age-related craniofacial changes on social perception. In T. R. Alley (Ed.), Social and applied aspects of perceiving faces (pp. 101-140). Hillsdale, NJ: Erlbaum.
3. Isaacs, L. W., & Bearison, D. J. (1986). The development of children's prejudice against the aged. International Journal of Aging and Human Development, 23, 175-194.
4. Jones, G., & Smith, P. K. (1984). The eyes have it: Young children's discrimination of age in masked and unmasked facial photographs. Journal of Experimental Child Psychology, 38, 328-337.
5. Katz, P. A., & Zalk, S. R. (1978). Modification of children's racial attitudes. Developmental Psychology, 14, 447-461.