Berk, L. E., & Winsler, A. (1995). Scaffolding children's learning: Vygotsky and early childhood education. National Association for the Education of Young Children.

Berk, Laura E., and Adam Winsler. Scaffolding Children's Learning: Vygotsky and Early Childhood Education. Washington: National Association for the Education of Young Children, 1995.

Berk, Laura E., and Adam Winsler. Scaffolding Children's Learning: Vygotsky and Early Childhood Education. National Association for the Education of Young Children, 1995.