एपीए उद्धरण

Vrat, P. (1998). Productivity management: A system approach. Narosa.

शिकागो स्टाइल उद्धरण

Vrat, Prem. Productivity Management: A System Approach. New Delhi: Narosa, 1998.

एमएलए उद्धरण

Vrat, Prem. Productivity Management: A System Approach. Narosa, 1998.