EBBY, C. B. H. (2021). A focus on addition and subtraction: : bringing mathematics education research to the classroom. Routledge.
Lua i Stíl Chicago (17ú heag.)EBBY, Caroline B. Hulbert. A Focus on Addition and Subtraction: : Bringing Mathematics Education Research to the Classroom. Routledge, 2021.
Lua MLA (9ú heag.)EBBY, Caroline B. Hulbert. A Focus on Addition and Subtraction: : Bringing Mathematics Education Research to the Classroom. Routledge, 2021.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.