7[7]Matlin,Margaret.(1983).Cognition.Holt,Rinehart and Winston.
8[8]Mayer,Richard E.and Moreno,Roxana.(1998)."A Split-Attention Effect in Multimedia Learning:Evidence for Dual Processing Systems in Working Memory." Journal of Educational Psychology,1998.Vol.90.No.2.312-320.
9[9]Papalia,Diane.E.& Olds,Sally Wendkos.(1988).Psychology.McGraw-Hill Book Company.
