APA ציטוט

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

Chicago Edition Citation

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

ציטוט MLA

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