APA (7th ed.) Citation

Smith, P. K., & Cowie, H. (1988). Understanding children's development. Blackwell.

Chicago Style (17th ed.) Citation

Smith, Peter K., and Helen Cowie. Understanding Children's Development. Oxford: Blackwell, 1988.

MLA (9th ed.) Citation

Smith, Peter K., and Helen Cowie. Understanding Children's Development. Blackwell, 1988.