Não informado. (1971). Early Child Development and Care. Gordon and Breach Science Publishers.
Lua i Stíl Chicago (17ú heag.)Não informado. Early Child Development and Care. London: Gordon and Breach Science Publishers, 1971.
Lua MLA (8ú heag.)Não informado. Early Child Development and Care. Gordon and Breach Science Publishers, 1971.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.