Al-Dekhyyel, N. A., & Halfin, H. (1981). Occupational analysis survey to determine competencies needed by local vocational education coordinators: (LVEC'S) or administrators. University of Wisconsin-Stout.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Al-Dekhyyel, Nasser A., و Harold Halfin. Occupational Analysis Survey to Determine Competencies Needed by Local Vocational Education Coordinators: (LVEC'S) or Administrators. Wisconsin: University of Wisconsin-Stout, 1981.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Al-Dekhyyel, Nasser A., و Harold Halfin. Occupational Analysis Survey to Determine Competencies Needed by Local Vocational Education Coordinators: (LVEC'S) or Administrators. University of Wisconsin-Stout, 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.