Berk, L. E. (2013). Child development (9th ed.). Pearson.
Lua i Stíl Chicago (17ú heag.)Berk, Laura E. Child Development. 9th ed. Boston: Pearson, 2013.
Lua MLA (9ú heag.)Berk, Laura E. Child Development. 9th ed. Pearson, 2013.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.