Sugarman, S. (1987). Piaget's construction of the child's reality. Cambridge University Press.
Lua i Stíl Chicago (17ú heag.)Sugarman, Susan. Piaget's Construction of the Child's Reality. Cambridge: Cambridge University Press, 1987.
Lua MLA (9ú heag.)Sugarman, Susan. Piaget's Construction of the Child's Reality. Cambridge University Press, 1987.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.