DUKES, C. S. (2014). Provision and progress for two year olds. SAGE.
Lua i Stíl Chicago (17ú heag.)DUKES, Chris Smith. Provision and Progress for Two Year Olds. SAGE, 2014.
Lua MLA (9ú heag.)DUKES, Chris Smith. Provision and Progress for Two Year Olds. SAGE, 2014.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.