Saad، H. (2000). Cross-Cultural Research on Cognitive Development in Infancy and Early Childhood: An Overview of Methods and Research. مجلة العلوم الإنسانية، ع14 ، 43 - 54. مسترجع من http://search.mandumah.com/Record/680589
Saad، Hacene. "Cross-Cultural Research On Cognitive Development in Infancy and Early Childhood: An Overview of Methods and Research." مجلة العلوم الإنسانية ع14 (2000): 43 - 54. مسترجع من http://search.mandumah.com/Record/680589