India. Dept. of Petroleum. (1981). Annual report. Govt. of India, Ministry of Petroleum, Chemicals, and Fertilizers, Dept. of Petroleum.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)India. Dept. of Petroleum. Annual Report. New Delhi: Govt. of India, Ministry of Petroleum, Chemicals, and Fertilizers, Dept. of Petroleum, 1981.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)India. Dept. of Petroleum. Annual Report. Govt. of India, Ministry of Petroleum, Chemicals, and Fertilizers, Dept. of Petroleum, 1981.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.