Charlesworth, R. (1996). Experiences in math for young children (3rd ed.). Delmar Publishers.
Lua i Stíl Chicago (17ú heag.)Charlesworth, Rosalind. Experiences in Math for Young Children. 3rd ed. Albany, N.Y: Delmar Publishers, 1996.
Lua MLA (9ú heag.)Charlesworth, Rosalind. Experiences in Math for Young Children. 3rd ed. Delmar Publishers, 1996.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.