APA (7th ed.) Citation

ScienceDirect (Online service), Schaie, K. W., & Willis, S. L. (2011). Handbook of the psychology of aging (7th ed.). Elsevier/Academic Press.

Chicago Style (17th ed.) Citation

ScienceDirect (Online service), K. Warner Schaie, and Sherry L. Willis. Handbook of the Psychology of Aging. 7th ed. Amsterdam ; Boston: Elsevier/Academic Press, 2011.

MLA (9th ed.) Citation

ScienceDirect (Online service), et al. Handbook of the Psychology of Aging. 7th ed. Elsevier/Academic Press, 2011.