Berk, L. E. (1997). Child development (4th ed.).
Lua i Stíl Chicago (17ú heag.)Berk, Laura E. Child Development. 4th ed. Allyn and Bacon, 1997.
Lua MLA (9ú heag.)Berk, Laura E. Child Development. 4th ed. 1997.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.