India. Dept. of Coal. Performance budget of Department of Coal, Ministry of Energy. Printed by the Manager, Govt. of India Press.
توثيق أسلوب شيكاغو (الطبعة السابعة عشر)India. Dept. of Coal. Performance Budget of Department of Coal, Ministry of Energy. Faridabad: Printed by the Manager, Govt. of India Press.
توثيق جمعية اللغة المعاصرة MLA (الطبعة الثامنة)India. Dept. of Coal. Performance Budget of Department of Coal, Ministry of Energy. Printed by the Manager, Govt. of India Press.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.