National productivity council. (1959). Productivity journal of NPC Vol Ni.1 1959-60. NPC.
Chicago Edition CitationNational productivity council. Productivity Journal of NPC Vol Ni.1 1959-60. New Delhi: NPC, 1959.
Cita MLANational productivity council. Productivity Journal of NPC Vol Ni.1 1959-60. NPC, 1959.
Atenció: Aquestes cites poden no estar 100% correctes.