Não informado. (1955). Personnel Management Abstracts. University of Michigan, Graduate School of Business Administration.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Não informado. Personnel Management Abstracts. Ann Arbor, Mich: University of Michigan, Graduate School of Business Administration, 1955.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)Não informado. Personnel Management Abstracts. University of Michigan, Graduate School of Business Administration, 1955.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.