Παραπομπή APA
United Nations. Economic Commission for Europe. (1978). Coal, 1985 and beyond: A perspective study of the coal industry in Europe and North America. Oxford ; New York: Published for the United Nations by Pergamon Press.
Παραπομπή Chicago StyleUnited Nations. Economic Commission for Europe. Coal, 1985 and Beyond: A Perspective Study of the Coal Industry in Europe and North America. Oxford ; New York: Published for the United Nations by Pergamon Press, 1978.
Παραπομπή MLAUnited Nations. Economic Commission for Europe. Coal, 1985 and Beyond: A Perspective Study of the Coal Industry in Europe and North America. Oxford ; New York: Published for the United Nations by Pergamon Press, 1978.
Πρόσοχή: Οι παραπομπές μπορεί να μην είναι 100% ακριβείς.