APA (7th ed.) Citation

Butterworth, G., & Harris, M. (1994). Principles of developmental psychology. L. Erlbaum Associates.

Chicago Style (17th ed.) Citation

Butterworth, George, and Margaret Harris. Principles of Developmental Psychology. Hove, East Sussex, UK ; Hillsdale, USA: L. Erlbaum Associates, 1994.

MLA (9th ed.) Citation

Butterworth, George, and Margaret Harris. Principles of Developmental Psychology. L. Erlbaum Associates, 1994.