एपीए उद्धरण

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

शिकागो स्टाइल उद्धरण

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

एमएलए उद्धरण

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