APA

Copple C., Bredekamp S. & National Association for the Education of Young Children. (2009). Developmentally appropriate practice in early childhood programs serving children from birth through age 8. Washington, D.C: National Association for the Education of Young Children.

Chicago

Copple Carol, Bredekamp Sue and National Association for the Education of Young Children. 2009. Developmentally appropriate practice in early childhood programs serving children from birth through age 8. Washington, D.C: National Association for the Education of Young Children.

Harvard

Copple C., Bredekamp S. and National Association for the Education of Young Children. (2009). Developmentally appropriate practice in early childhood programs serving children from birth through age 8. Washington, D.C: National Association for the Education of Young Children.

MLA

Copple Carol, Bredekamp Sue and National Association for the Education of Young Children. Developmentally appropriate practice in early childhood programs serving children from birth through age 8. Washington, D.C: National Association for the Education of Young Children. 2009.