Coal, I. C. o. E. i. t. P. o. (1979). Spotlight on coal: Report of the Committee on Economies in the Production of Coal, Govt. of India. India Book Exchange.
শিকাগো স্টাইল (17 তম সংস্করণ) উদ্ধৃতিCoal, India. Committee on Economies in the Production of. Spotlight on Coal: Report of the Committee on Economies in the Production of Coal, Govt. of India. India Book Exchange, 1979.
M.L.A (9 ম সংস্করণ) উদ্ধৃতিCoal, India. Committee on Economies in the Production of. Spotlight on Coal: Report of the Committee on Economies in the Production of Coal, Govt. of India. India Book Exchange, 1979.
সতর্কবাণী: সাইটেশন সবসময় 100% নির্ভুল হতে পারে না.