Berk, L. E. (2000). Child developmentLaura E. Berk. Allyn and Bacon.
Lua i Stíl Chicago (17ú heag.)Berk, Laura E. Child DevelopmentLaura E. Berk. Allyn and Bacon, 2000.
Lua MLA (8ú heag.)Berk, Laura E. Child DevelopmentLaura E. Berk. Allyn and Bacon, 2000.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.