India. Directorate General of Technical Development. (1980). Handbook of foreign collaboration 1980. Govt. of India, Directorate General of Technical Development, Ministry of Industry.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)India. Directorate General of Technical Development. Handbook of Foreign Collaboration 1980. New Delhi: Govt. of India, Directorate General of Technical Development, Ministry of Industry, 1980.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)India. Directorate General of Technical Development. Handbook of Foreign Collaboration 1980. Govt. of India, Directorate General of Technical Development, Ministry of Industry, 1980.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.