, U. N. D. (1990). Specialist course in coal technology coal and the enviroment. Vol.1 - United Nation Development Programme Economic and Social Commission for Asia and the pacific. Austrlaia International development Asisten Bureau.
Chicago Style (17th ed.) Citation, United Nation Development. Specialist Course in Coal Technology Coal and the Enviroment. Vol.1 - United Nation Development Programme Economic and Social Commission for Asia and the Pacific. Austrlaia International development Asisten Bureau, 1990.
MLA (8th ed.) Citation, United Nation Development. Specialist Course in Coal Technology Coal and the Enviroment. Vol.1 - United Nation Development Programme Economic and Social Commission for Asia and the Pacific. Austrlaia International development Asisten Bureau, 1990.