Παραπομπή APA

National productivity council. (1959). Productivity journal of NPC Vol Ni.1 1959-60. NPC.

Παραπομπή Chicago Style

National productivity council. Productivity Journal of NPC Vol Ni.1 1959-60. New Delhi: NPC, 1959.

Παραπομπή MLA

National productivity council. Productivity Journal of NPC Vol Ni.1 1959-60. NPC, 1959.