APA (7 ম সংস্করণ) উদ্ধৃতি

Organisation for Economic Co-operation and Development, P. (1978). Steam coal: Prospects to 2000. OECD.

শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতি

Organisation for Economic Co-operation and Development, Paris. Steam Coal: Prospects to 2000. OECD, 1978.

M.L.A (9 ম সংস্করণ) উদ্ধৃতি

Organisation for Economic Co-operation and Development, Paris. Steam Coal: Prospects to 2000. OECD, 1978.