Bengtson, V. L., & Schaie, K. W. (1999). Handbook of theories of aging. New York: Springer Pub. Co.
Čikaški stil citiranjaBengtson, Vern L., i K. Warner Schaie. Handbook of Theories of Aging. New York: Springer Pub. Co, 1999.
MLA način citiranjaBengtson, Vern L., i K. Warner Schaie. Handbook of Theories of Aging. New York: Springer Pub. Co, 1999.
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