APA (7th ed.) Citation

Sigel, I. E., Brodzinsky, D. M., & Golinkoff, R. M. (1981). New directions in piagetian theory and practice. Lawrence Erlbaum.

Chicago Style (17th ed.) Citation

Sigel, Irving E., David M. Brodzinsky, and Roberta M. Golinkoff. New Directions in Piagetian Theory and Practice. Hillsdale: Lawrence Erlbaum, 1981.

MLA (9th ed.) Citation

Sigel, Irving E., et al. New Directions in Piagetian Theory and Practice. Lawrence Erlbaum, 1981.