Citazione Stile APA (7a Edizione)

Schaie, K. W., & Willis, S. L. (1991). Adult development and aging (3rd ed.). Harper/Collins.

Citazione stile Chigago Style (17a edizione)

Schaie, K. Warner, e Sherry L. Willis. Adult Development and Aging. 3rd ed. New York: Harper/Collins, 1991.

Citatione MLA (9a ed.)

Schaie, K. Warner, e Sherry L. Willis. Adult Development and Aging. 3rd ed. Harper/Collins, 1991.