Sughayer، H.، و Brown، E. D. (1989). SCIENCE EDUCATION AND THE MEDIUM OF INSTRUCTION: DOES THE LANGUAGE OF INSTRUCTION AFFECT SCIENCE ACHIEVEMENT (رسالة دكتوراه غير منشورة). University of Arizona، توسان. مسترجع من http://search.mandumah.com/Record/617617
Sughayer، Husa، و Edward D. Brown. "SCIENCE EDUCATION AND THE MEDIUM OF INSTRUCTION: DOES THE LANGUAGE OF INSTRUCTION AFFECT SCIENCE ACHIEVEMENT" رسالة دكتوراه. University of Arizona، توسان، 1989. مسترجع من http://search.mandumah.com/Record/617617