APA (7th ed.) Citation

ScienceDirect (Online service), Schaie, K. W., Willis, S. L., Knight, B. G., Levy, B., & Resnick, S. M. (2021). Handbook of the psychology of aging (Ninth edition.). Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), K. Warner Schaie, Sherry L. Willis, Bob G. Knight, Becca Levy, and Susan M. Resnick. Handbook of the Psychology of Aging. Ninth edition. London, United Kingdom ; San Diego, CA: Academic Press, 2021.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Handbook of the Psychology of Aging. Ninth edition. Academic Press, 2021.