Παραπομπή APA

National Productivity Council (India). National seminar on productivity proceedings. National Productivity Council (India).

Παραπομπή Chicago Style

National Productivity Council (India). National Seminar on Productivity Proceedings. New Delhi: National Productivity Council (India).

Παραπομπή MLA

National Productivity Council (India). National Seminar on Productivity Proceedings. National Productivity Council (India).