APA-viite

National productivity council. (1965). Refractories industry in USA, Britain and West Germany. National productivity council.

Chicago-tyylinen lähdeviittaus

National productivity council. Refractories Industry in USA, Britain and West Germany. New Delhi: National productivity council, 1965.

MLA-viite

National productivity council. Refractories Industry in USA, Britain and West Germany. National productivity council, 1965.