एपीए उद्धरण

National productivity council & Altekar, V. (1975). Productivity. National productivity council.

शिकागो स्टाइल उद्धरण

National productivity council और V.A Altekar. Productivity. New Delhi: National productivity council, 1975.

एमएलए उद्धरण

National productivity council और V.A Altekar. Productivity. National productivity council, 1975.