Cita APA (7th ed.)

Shaffer, D. R. (1989). Developmental psychology: Childhood and adolescence (2nd ed.). Brooks/Cole.

Cita Chicago (17th ed.)

Shaffer, David R. Developmental Psychology: Childhood and Adolescence. 2nd ed. Pacific Grove, Calif.: Brooks/Cole, 1989.

Cita MLA (8th ed.)

Shaffer, David R. Developmental Psychology: Childhood and Adolescence. 2nd ed. Brooks/Cole, 1989.