Osailan, Y. S., & Halfin, H. (1986). Identifying the competencies needed for training specialists in the Saudi Arabian industries. University of Wisconsin.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Osailan, Yaseen S., و Harold Halfin. Identifying the Competencies Needed for Training Specialists in the Saudi Arabian Industries. University of Wisconsin, 1986.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Osailan, Yaseen S., و Harold Halfin. Identifying the Competencies Needed for Training Specialists in the Saudi Arabian Industries. University of Wisconsin, 1986.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.