Knauthe, H. E. (1967). Financing of Nationally-owned Industries in the GDR. The Institute of National Planning.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)Knauthe, Habil Erhart. Financing of Nationally-owned Industries in the GDR. Cairo: The Institute of National Planning, 1967.
توثيق جمعية اللغة المعاصرة MLA (الإصدار التاسع)Knauthe, Habil Erhart. Financing of Nationally-owned Industries in the GDR. The Institute of National Planning, 1967.