APA
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . (1977). Annual report,1972-73. New Delhi: National Productivity Council.
Chicago
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . 1977. Annual report,1972-73. New Delhi: National Productivity Council.
Harvard
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . (1977). Annual report,1972-73. New Delhi: National Productivity Council.
MLA
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . Annual report,1972-73. New Delhi: National Productivity Council. 1977.
