Cita APA (7a ed.)

Schaie, K. W., & Willis, S. L. (1996). Adult development and aging (4th ed.). Harper Collins College.

Cita Chicago Style (17a ed.)

Schaie, K. Warner, y Sherry L. Willis. Adult Development and Aging. 4th ed. New York: Harper Collins College, 1996.

Cita MLA (9a ed.)

Schaie, K. Warner, y Sherry L. Willis. Adult Development and Aging. 4th ed. Harper Collins College, 1996.