Παραπομπή APA

Upadyaya, D. (1983). Productivity. N.P.C.

Παραπομπή Chicago Style

Upadyaya, D.P. Productivity. New Delhi: N.P.C, 1983.

Παραπομπή MLA

Upadyaya, D.P. Productivity. N.P.C, 1983.