Citazione Stile APA (7a Edizione)

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

Citazione stile Chigago Style (17a edizione)

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

Citatione MLA (9a ed.)

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