Ismail Ibrahim. (1989). Aspiration and expectation of vocational secondary school students pertaining to education and occupation.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Ismail Ibrahim. Aspiration and Expectation of Vocational Secondary School Students Pertaining to Education and Occupation. 1989.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Ismail Ibrahim. Aspiration and Expectation of Vocational Secondary School Students Pertaining to Education and Occupation. 1989.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.