APA
E. Sigel Irving, Brodzinsky M.David & M.Golinkoff Roberta. (1981). New directions in piagetian theory and practice. New Jersey: Lawrence Erlbaum Associates, Publishers.
Chicago
E. Sigel Irving, Brodzinsky M.David and M.Golinkoff Roberta. 1981. New directions in piagetian theory and practice. New Jersey: Lawrence Erlbaum Associates, Publishers.
Harvard
E. Sigel Irving, Brodzinsky M.David and M.Golinkoff Roberta. (1981). New directions in piagetian theory and practice. New Jersey: Lawrence Erlbaum Associates, Publishers.
MLA
E. Sigel Irving, Brodzinsky M.David and M.Golinkoff Roberta. New directions in piagetian theory and practice. New Jersey: Lawrence Erlbaum Associates, Publishers. 1981.
