Παραπομπή σε μορφή APA (7η εκδ.)

India. Dept. of Coal & India. Dept. of Coal. Annual report - Department of Coal. Govt. of India, Ministry of Energy, Dept. of Coal.

Παραπομπή σε μορφή Chicago (17η εκδ.)

India. Dept. of Coal και India. Dept. of Coal. Annual Report - Department of Coal. New Delhi: Govt. of India, Ministry of Energy, Dept. of Coal.

Παραπομπή σε μορφή MLA (8th εκδ.)

India. Dept. of Coal και India. Dept. of Coal. Annual Report - Department of Coal. Govt. of India, Ministry of Energy, Dept. of Coal.