Al Faleg، O. A.، و Gradman، H. L. (1991). A COMPARISON OF MORPHEME ACQUISITION ORDER IN LEARNERS OF ENGLISH AS A FOREIGN LANGUAGE VERSUS ENGLISH AS A SECOND LANGUAGE: THE CASE OF ADULT LEARNERS IN SAUDI ARABIA (رسالة دكتوراه غير منشورة). Indiana University، إنديانا. مسترجع من http://search.mandumah.com/Record/612539
Al Faleg، Omar A.، و Harry L. Gradman. "A COMPARISON OF MORPHEME ACQUISITION ORDER IN LEARNERS OF ENGLISH AS A FOREIGN LANGUAGE VERSUS ENGLISH AS A SECOND LANGUAGE: THE CASE OF ADULT LEARNERS IN SAUDI ARABIA" رسالة دكتوراه. Indiana University، إنديانا، 1991. مسترجع من http://search.mandumah.com/Record/612539