Knauthe, H. E., & Horn, K. (1968). Some Remarks on Wage Form and Job Evaluation in the GDR. The Institute of National Planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Knauthe, Habil Erhart, و Karl-Heinz Horn. Some Remarks on Wage Form and Job Evaluation in the GDR. Cairo: The Institute of National Planning, 1968.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Knauthe, Habil Erhart, و Karl-Heinz Horn. Some Remarks on Wage Form and Job Evaluation in the GDR. The Institute of National Planning, 1968.