Παραπομπή APA

National Productivity council. (1963). Industrial maintenance in W.Germany, Britain and USA. Natioanl productivity council.

Παραπομπή Chicago Style

National Productivity council. Industrial Maintenance in W.Germany, Britain and USA. New Delhi: Natioanl productivity council, 1963.

Παραπομπή MLA

National Productivity council. Industrial Maintenance in W.Germany, Britain and USA. Natioanl productivity council, 1963.