Shaffer, D. R. (1989). Developmental psychology: Childhood and adolescence (2nd ed.). Brooks/Cole.
Lua i Stíl Chicago (17ú heag.)Shaffer, David R. Developmental Psychology: Childhood and Adolescence. 2nd ed. Pacific Grove, Calif.: Brooks/Cole, 1989.
Lua MLA (8ú heag.)Shaffer, David R. Developmental Psychology: Childhood and Adolescence. 2nd ed. Brooks/Cole, 1989.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.