1. Achenbaum, A. (1995). Crossing frontiers: Gerontology emerges as a science. Cambridge: Cambridge University Press.
2. Achenbaum, W. A. (2009). A metahistorical perspective on theories of ageing. In V. L. Bengston, D. Gans, N. M. Putney, & M. Silverstein (Eds.), Handbook of the theories of ageing (2nd ed., pp. 25–38). New York: Springer.
3. Adler, F. R. (2012). Modeling the dynamics of life: Calculus and probability for life scientists (3rd ed.). Independence: Cengage Learning.
4. Agamben, G. (2009). The signature of all things. New York: Zone Books.
5. Aldwin, C., & Gilmer, D. (2013). Health, illness, and optimal ageing: Biological and psychosocial perspectives. New York: Springer.