Shennan، A. M. A. H.، و Sonuga-Barke، E. J. S. (2001). Family Size in the Sudan: Its Economic and Cultural Associations and its Implications for Child Adjustment. دراسات إفريقية، ع26 ، 7 - 28. مسترجع من http://search.mandumah.com/Record/791436
Shennan، Ahmed M. Al Hassan، و Edmund J. S. Sonuga-Barke. "Family Size in the Sudan: Its Economic and Cultural Associations and Its Implications for Child Adjustment." دراسات إفريقية ع26 (2001): 7 - 28. مسترجع من http://search.mandumah.com/Record/791436