Beckett, C. Human growth and development. Sage Publications.
Lua i Stíl Chicago (17ú heag.)Beckett, Chris. Human Growth and Development. Sage Publications.
Lua MLA (8ú heag.)Beckett, Chris. Human Growth and Development. Sage Publications.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.