National Productivity council. (1963). Industrial maintenance in W.Germany, Britain and USA. Natioanl productivity council.
استشهاد بنمط شيكاغوNational Productivity council. Industrial Maintenance in W.Germany, Britain and USA. New Delhi: Natioanl productivity council, 1963.
MLA استشهادNational Productivity council. Industrial Maintenance in W.Germany, Britain and USA. Natioanl productivity council, 1963.
تحذير: قد لا تكون هذه الاستشهادات دائما دقيقة بنسبة 100%.