Al Dalooj، E. T.، Sabbah، W.، و Watt، R. (2011). The Influence of Socioeconomic Position and Ethnicity on Dental Caries and Perceived Oral Health Among US Adolescents (رسالة ماجستير غير منشورة). University College London، لندن. مسترجع من http://search.mandumah.com/Record/602389
Al Dalooj، Esraa Talib، Wael Sabbah، و Richard Watt. "The Influence of Socioeconomic Position and Ethnicity On Dental Caries and Perceived Oral Health Among US Adolescents" رسالة ماجستير. University College London، لندن، 2011. مسترجع من http://search.mandumah.com/Record/602389