APA (7e ed.) Bronvermelding

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

Chicago (17e ed.) Bronvermelding

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

MLA (9e ed.) Bronvermelding

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