APA (7th ed.) Citation

Smith, P. K., & Cowie, H. (1991). Understanding children's development (2nd ed.). Basil Blackwell.

Chicago Style (17th ed.) Citation

Smith, Peter K., and Helen Cowie. Understanding Children's Development. 2nd ed. Oxford: Basil Blackwell, 1991.

MLA (9th ed.) Citation

Smith, Peter K., and Helen Cowie. Understanding Children's Development. 2nd ed. Basil Blackwell, 1991.