Kandel, I. L. (1917). Federal aid for vocational education: A report to the Carnegie Foundation for the advancement of teaching. [s.n..
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Kandel, Isaac Leon. Federal Aid for Vocational Education: A Report to the Carnegie Foundation for the Advancement of Teaching. New York City: [s.n., 1917.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Kandel, Isaac Leon. Federal Aid for Vocational Education: A Report to the Carnegie Foundation for the Advancement of Teaching. [s.n., 1917.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.