Keenan, T. An introduction to child development. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Keenan, Thomas. An Introduction to Child Development. Sage Publications.
Lua MLA (8ú heag.)Keenan, Thomas. An Introduction to Child Development. Sage Publications.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.