APA
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . (1972). Annual report,1969-70. New Delhi: national Productivity Council.
Chicago
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . 1972. Annual report,1969-70. New Delhi: national Productivity Council.
Harvard
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . (1972). Annual report,1969-70. New Delhi: national Productivity Council.
MLA
NATIONAL PRODUCTIVITY COUNCIL, NATIONAL PRODUCTIVITY COUNCIL, . Annual report,1969-70. New Delhi: national Productivity Council. 1972.
